257085788 has 12 divisors (see below), whose sum is σ = 452185272. Its totient is φ = 127890000.

The previous prime is 257085769. The next prime is 257085799. The reversal of 257085788 is 887580752.

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, 162338 + ... + 163913.

It is an arithmetic number, because the mean of its divisors is an integer number (37682106).

Almost surely, 2^257085788 is an apocalyptic number.

It is an amenable number.

257085788 is a deficient number, since it is larger than the sum of its proper divisors (195099484).

257085788 is a wasteful number, since it uses less digits than its factorization.

257085788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326452 (or 326450 counting only the distinct ones).

The product of its (nonzero) digits is 1254400, while the sum is 50.

The square root of 257085788 is about 16033.8949728380. The cubic root of 257085788 is about 635.8568530600.

The spelling of 257085788 in words is "two hundred fifty-seven million, eighty-five thousand, seven hundred eighty-eight".