257727428 has 24 divisors (see below), whose sum is σ = 532084224. Its totient is φ = 106891200.

The previous prime is 257727413. The next prime is 257727433. The reversal of 257727428 is 824727752.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147593 + ... + 149328.

It is an arithmetic number, because the mean of its divisors is an integer number (22170176).

Almost surely, 2^257727428 is an apocalyptic number.

257727428 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

257727428 is an abundant number, since it is smaller than the sum of its proper divisors (274356796).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

257727428 is a wasteful number, since it uses less digits than its factorization.

257727428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296963 (or 296961 counting only the distinct ones).

The product of its digits is 439040, while the sum is 44.

The square root of 257727428 is about 16053.8913662700. The cubic root of 257727428 is about 636.3854084499.

The spelling of 257727428 in words is "two hundred fifty-seven million, seven hundred twenty-seven thousand, four hundred twenty-eight".