| Base | Representation |
|---|---|
| bin | 101111110011… |
| … | …010100101100 |
| 3 | 212120122021200 |
| 4 | 233303110230 |
| 5 | 11201442423 |
| 6 | 1124325500 |
| 7 | 211340331 |
| oct | 57632454 |
| 9 | 25518250 |
| 10 | 12530988 |
| 11 | 7089798 |
| 12 | 4243890 |
| 13 | 27998b2 |
| 14 | 1942988 |
| 15 | 1177d43 |
| hex | bf352c |
12530988 has 18 divisors (see below), whose sum is σ = 31675644. Its totient is φ = 4176984.
The previous prime is 12530983. The next prime is 12530993. The reversal of 12530988 is 88903521.
It is an interprime number because it is at equal distance from previous prime (12530983) and next prime (12530993).
It is a tau number, because it is divible by the number of its divisors (18).
It is a super-2 number, since 2×125309882 = 314051320512288, which contains 22 as substring.
It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.
It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 348083 = 12530988 / (1 + 2 + 5 + 3 + 0 + 9 + 8 + 8).
It is not an unprimeable number, because it can be changed into a prime (12530983) by changing a digit.
It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 174006 + ... + 174077.
It is an arithmetic number, because the mean of its divisors is an integer number (1759758).
Almost surely, 212530988 is an apocalyptic number.
12530988 is a gapful number since it is divisible by the number (18) formed by its first and last digit.
It is an amenable number.
12530988 is an abundant number, since it is smaller than the sum of its proper divisors (19144656).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
12530988 is a wasteful number, since it uses less digits than its factorization.
12530988 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 348093 (or 348088 counting only the distinct ones).
The product of its (nonzero) digits is 17280, while the sum is 36.
The square root of 12530988 is about 3539.9135582666. The cubic root of 12530988 is about 232.2710614964.
It can be divided in two parts, 125 and 30988, that added together give a palindrome (31113).
The spelling of 12530988 in words is "twelve million, five hundred thirty thousand, nine hundred eighty-eight".
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