257206028 has 12 divisors (see below), whose sum is σ = 450496200. Its totient is φ = 128492832.

The previous prime is 257206009. The next prime is 257206031. The reversal of 257206028 is 820602752.

257206028 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 257205985 and 257206003.

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, 22178 + ... + 31721.

It is an arithmetic number, because the mean of its divisors is an integer number (37541350).

Almost surely, 2^257206028 is an apocalyptic number.

It is an amenable number.

257206028 is a deficient number, since it is larger than the sum of its proper divisors (193290172).

257206028 is a wasteful number, since it uses less digits than its factorization.

257206028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55096 (or 55094 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 257206028 is about 16037.6440913246. The cubic root of 257206028 is about 635.9559684982.

The spelling of 257206028 in words is "two hundred fifty-seven million, two hundred six thousand, twenty-eight".