915138256 has 20 divisors (see below), whose sum is σ = 1780697412. Its totient is φ = 455603456.

The previous prime is 915138253. The next prime is 915138277. The reversal of 915138256 is 652831519.

It can be written as a sum of positive squares in 2 ways, for example, as 222606400 + 692531856 = 14920^2 + 26316^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (915138253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119011 + ... + 126466.

Almost surely, 2^915138256 is an apocalyptic number.

It is an amenable number.

915138256 is a deficient number, since it is larger than the sum of its proper divisors (865559156).

915138256 is a wasteful number, since it uses less digits than its factorization.

915138256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245718 (or 245712 counting only the distinct ones).

The product of its digits is 64800, while the sum is 40.

The square root of 915138256 is about 30251.2521393743. The cubic root of 915138256 is about 970.8725828672.

The spelling of 915138256 in words is "nine hundred fifteen million, one hundred thirty-eight thousand, two hundred fifty-six".