256118136 has 32 divisors (see below), whose sum is σ = 642988800. Its totient is φ = 85013600.

The previous prime is 256118099. The next prime is 256118147. The reversal of 256118136 is 631811652.

It is a super-2 number, since 2×256118136² = 131192999176228992, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 256118097 and 256118106.

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 7 ways as a sum of consecutive naturals, for example, 16590 + ... + 28061.

It is an arithmetic number, because the mean of its divisors is an integer number (20093400).

Almost surely, 2^256118136 is an apocalyptic number.

It is an amenable number.

256118136 is an abundant number, since it is smaller than the sum of its proper divisors (386870664).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256118136 is a wasteful number, since it uses less digits than its factorization.

256118136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44899 (or 44895 counting only the distinct ones).

The product of its digits is 8640, while the sum is 33.

The square root of 256118136 is about 16003.6913241914. The cubic root of 256118136 is about 635.0580772309.

Adding to 256118136 its reverse (631811652), we get a palindrome (887929788).

The spelling of 256118136 in words is "two hundred fifty-six million, one hundred eighteen thousand, one hundred thirty-six".