57728135 has 4 divisors (see below), whose sum is σ = 69273768. Its totient is φ = 46182504.

The previous prime is 57728119. The next prime is 57728147. The reversal of 57728135 is 53182775.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 57728135 - 2⁴ = 57728119 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 5772809 + ... + 5772818.

It is an arithmetic number, because the mean of its divisors is an integer number (17318442).

Almost surely, 2^57728135 is an apocalyptic number.

57728135 is a deficient number, since it is larger than the sum of its proper divisors (11545633).

57728135 is a wasteful number, since it uses less digits than its factorization.

57728135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11545632.

The product of its digits is 58800, while the sum is 38.

The square root of 57728135 is about 7597.9033292087. The cubic root of 57728135 is about 386.4819143969.

The spelling of 57728135 in words is "fifty-seven million, seven hundred twenty-eight thousand, one hundred thirty-five".