Base | Representation |
---|---|
bin | 111010101010… |
… | …111000111110 |
3 | 1001221101102202 |
4 | 322222320332 |
5 | 12414130110 |
6 | 1305351502 |
7 | 244504511 |
oct | 72527076 |
9 | 31841382 |
10 | 15380030 |
11 | 8755276 |
12 | 5198592 |
13 | 3256613 |
14 | 2084d78 |
15 | 153c0a5 |
hex | eaae3e |
15380030 has 16 divisors (see below), whose sum is σ = 28577664. Its totient is φ = 5953440.
The previous prime is 15380023. The next prime is 15380039. The reversal of 15380030 is 3008351.
It is a junction number, because it is equal to n+sod(n) for n = 15379984 and 15380011.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (15380039) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24497 + ... + 25116.
It is an arithmetic number, because the mean of its divisors is an integer number (1786104).
Almost surely, 215380030 is an apocalyptic number.
15380030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
15380030 is a deficient number, since it is larger than the sum of its proper divisors (13197634).
15380030 is a wasteful number, since it uses less digits than its factorization.
15380030 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 49651.
The product of its (nonzero) digits is 360, while the sum is 20.
The square root of 15380030 is about 3921.7381350621. The cubic root of 15380030 is about 248.6866053950.
Adding to 15380030 its reverse (3008351), we get a palindrome (18388381).
The spelling of 15380030 in words is "fifteen million, three hundred eighty thousand, thirty".
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