257012938 has 48 divisors (see below), whose sum is σ = 490329504. Its totient is φ = 100124640.

The previous prime is 257012927. The next prime is 257012939. The reversal of 257012938 is 839210752.

It is a junction number, because it is equal to n+sod(n) for n = 257012897 and 257012906.

It is not an unprimeable number, because it can be changed into a prime (257012939) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83853 + ... + 86863.

It is an arithmetic number, because the mean of its divisors is an integer number (10215198).

Almost surely, 2^257012938 is an apocalyptic number.

257012938 is a deficient number, since it is larger than the sum of its proper divisors (233316566).

257012938 is a wasteful number, since it uses less digits than its factorization.

257012938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3107 (or 3100 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 257012938 is about 16031.6230619361. The cubic root of 257012938 is about 635.7967867967.

The spelling of 257012938 in words is "two hundred fifty-seven million, twelve thousand, nine hundred thirty-eight".