257025028 has 24 divisors (see below), whose sum is σ = 501099480. Its totient is φ = 114535680.

The previous prime is 257025019. The next prime is 257025029. The reversal of 257025028 is 820520752.

It can be written as a sum of positive squares in 4 ways, for example, as 38044224 + 218980804 = 6168^2 + 14798^2 .

It is not an unprimeable number, because it can be changed into a prime (257025029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83713 + ... + 86728.

It is an arithmetic number, because the mean of its divisors is an integer number (20879145).

Almost surely, 2^257025028 is an apocalyptic number.

It is an amenable number.

257025028 is a deficient number, since it is larger than the sum of its proper divisors (244074452).

257025028 is a wasteful number, since it uses less digits than its factorization.

257025028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170487 (or 170485 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 31.

The square root of 257025028 is about 16032.0001247505. Note that the first 3 decimals coincide. The cubic root of 257025028 is about 635.8067560259.

The spelling of 257025028 in words is "two hundred fifty-seven million, twenty-five thousand, twenty-eight".