57728535 has 8 divisors (see below), whose sum is σ = 92365680. Its totient is φ = 30788544.

The previous prime is 57728521. The next prime is 57728537. The reversal of 57728535 is 53582775.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 57728535 - 2¹⁵ = 57695767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57728537) 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, 1924270 + ... + 1924299.

It is an arithmetic number, because the mean of its divisors is an integer number (11545710).

Almost surely, 2^57728535 is an apocalyptic number.

57728535 is a deficient number, since it is larger than the sum of its proper divisors (34637145).

57728535 is a wasteful number, since it uses less digits than its factorization.

57728535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3848577.

The product of its digits is 294000, while the sum is 42.

The square root of 57728535 is about 7597.9296522145. The cubic root of 57728535 is about 386.4828070431.

Subtracting from 57728535 its reverse (53582775), we obtain a triangular number (4145760 = T₂₈₇₉).

The spelling of 57728535 in words is "fifty-seven million, seven hundred twenty-eight thousand, five hundred thirty-five".