257238044 has 36 divisors (see below), whose sum is σ = 533565144. Its totient is φ = 108160416.

The previous prime is 257238043. The next prime is 257238127. The reversal of 257238044 is 440832752.

It is a super-2 number, since 2×257238044² = 132342822561891872, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 257237995 and 257238013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257238043) by changing a digit.

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, 1994 + ... + 22769.

It is an arithmetic number, because the mean of its divisors is an integer number (14821254).

Almost surely, 2^257238044 is an apocalyptic number.

It is an amenable number.

257238044 is an abundant number, since it is smaller than the sum of its proper divisors (276327100).

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

257238044 is a wasteful number, since it uses less digits than its factorization.

257238044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24834 (or 24825 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 35.

The square root of 257238044 is about 16038.6422118582. The cubic root of 257238044 is about 635.9823545069.

The spelling of 257238044 in words is "two hundred fifty-seven million, two hundred thirty-eight thousand, forty-four".