257673236 has 12 divisors (see below), whose sum is σ = 466477620. Its totient is φ = 124393920.

The previous prime is 257673197. The next prime is 257673253. The reversal of 257673236 is 632376752.

257673236 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 148596100 + 109077136 = 12190^2 + 10444^2 .

It is a junction number, because it is equal to n+sod(n) for n = 257673193 and 257673202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1110545 + ... + 1110776.

It is an arithmetic number, because the mean of its divisors is an integer number (38873135).

Almost surely, 2^257673236 is an apocalyptic number.

It is an amenable number.

257673236 is a deficient number, since it is larger than the sum of its proper divisors (208804384).

257673236 is a wasteful number, since it uses less digits than its factorization.

257673236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2221354 (or 2221352 counting only the distinct ones).

The product of its digits is 317520, while the sum is 41.

The square root of 257673236 is about 16052.2034624534. The cubic root of 257673236 is about 636.3408013550.

The spelling of 257673236 in words is "two hundred fifty-seven million, six hundred seventy-three thousand, two hundred thirty-six".