57028557 has 32 divisors (see below), whose sum is σ = 85449600. Its totient is φ = 33619968.

The previous prime is 57028513. The next prime is 57028571. The reversal of 57028557 is 75582075.

It is not a de Polignac number, because 57028557 - 2⁶ = 57028493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57028157) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 221773 + ... + 222029.

It is an arithmetic number, because the mean of its divisors is an integer number (2670300).

Almost surely, 2^57028557 is an apocalyptic number.

57028557 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

It is an amenable number.

57028557 is a deficient number, since it is larger than the sum of its proper divisors (28421043).

57028557 is a wasteful number, since it uses less digits than its factorization.

57028557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525.

The product of its (nonzero) digits is 98000, while the sum is 39.

The square root of 57028557 is about 7551.7254319791. The cubic root of 57028557 is about 384.9143723665.

The spelling of 57028557 in words is "fifty-seven million, twenty-eight thousand, five hundred fifty-seven".