57128267 has 12 divisors (see below), whose sum is σ = 67369896. Its totient is φ = 48293280.

The previous prime is 57128249. The next prime is 57128311. The reversal of 57128267 is 76282175.

It is not a de Polignac number, because 57128267 - 2¹⁴ = 57111883 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 57128267.

It is not an unprimeable number, because it can be changed into a prime (57128207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4409 + ... + 11562.

It is an arithmetic number, because the mean of its divisors is an integer number (5614158).

Almost surely, 2^57128267 is an apocalyptic number.

57128267 is a deficient number, since it is larger than the sum of its proper divisors (10241629).

57128267 is a wasteful number, since it uses less digits than its factorization.

57128267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16058 (or 16051 counting only the distinct ones).

The product of its digits is 47040, while the sum is 38.

The square root of 57128267 is about 7558.3243513361. The cubic root of 57128267 is about 385.1385727072.

The spelling of 57128267 in words is "fifty-seven million, one hundred twenty-eight thousand, two hundred sixty-seven".