257105392 has 10 divisors (see below), whose sum is σ = 498141728. Its totient is φ = 128552688.

The previous prime is 257105377. The next prime is 257105393. The reversal of 257105392 is 293501752.

It is a super-2 number, since 2×257105392² = 132206365190947328, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257105393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8034528 + ... + 8034559.

Almost surely, 2^257105392 is an apocalyptic number.

It is an amenable number.

257105392 is a deficient number, since it is larger than the sum of its proper divisors (241036336).

257105392 is a wasteful number, since it uses less digits than its factorization.

257105392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16069095 (or 16069089 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 257105392 is about 16034.5062911210. The cubic root of 257105392 is about 635.8730150073.

The spelling of 257105392 in words is "two hundred fifty-seven million, one hundred five thousand, three hundred ninety-two".