| Base | Representation |
|---|---|
| bin | 111010011101… |
| … | …0110101010000 |
| 3 | 2010200011110100 |
| 4 | 1310322311100 |
| 5 | 30321242210 |
| 6 | 3012532400 |
| 7 | 521342445 |
| oct | 164726520 |
| 9 | 63604410 |
| 10 | 30649680 |
| 11 | 16334616 |
| 12 | a321100 |
| 13 | 6471909 |
| 14 | 40db9cc |
| 15 | 2a565c0 |
| hex | 1d3ad50 |
30649680 has 60 divisors (see below), whose sum is σ = 102934260. Its totient is φ = 8173056.
The previous prime is 30649667. The next prime is 30649711. The reversal of 30649680 is 8694603.
30649680 is a `hidden beast` number, since 3 + 0 + 649 + 6 + 8 + 0 = 666.
It can be written as a sum of positive squares in 2 ways, for example, as 12194064 + 18455616 = 3492^2 + 4296^2 .
It is a tau number, because it is divible by the number of its divisors (60).
It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.
It is a Harshad number since it is a multiple of its sum of digits (36).
It is a nialpdrome in base 12.
It is a congruent number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20565 + ... + 22004.
It is an arithmetic number, because the mean of its divisors is an integer number (1715571).
Almost surely, 230649680 is an apocalyptic number.
30649680 is a gapful number since it is divisible by the number (30) formed by its first and last digit.
It is an amenable number.
30649680 is an abundant number, since it is smaller than the sum of its proper divisors (72284580).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
30649680 is a wasteful number, since it uses less digits than its factorization.
30649680 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 42588 (or 42579 counting only the distinct ones).
The product of its (nonzero) digits is 31104, while the sum is 36.
The square root of 30649680 is about 5536.2153137319. The cubic root of 30649680 is about 312.9502586766.
It can be divided in two parts, 30649 and 680, that added together give a square (31329 = 1772).
The spelling of 30649680 in words is "thirty million, six hundred forty-nine thousand, six hundred eighty".
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