28813057 has 16 divisors (see below), whose sum is σ = 35747712. Its totient is φ = 22613760.

The previous prime is 28813049. The next prime is 28813061. The reversal of 28813057 is 75031882.

It is not a de Polignac number, because 28813057 - 2³ = 28813049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28813087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10713 + ... + 13129.

It is an arithmetic number, because the mean of its divisors is an integer number (2234232).

Almost surely, 2^28813057 is an apocalyptic number.

It is an amenable number.

28813057 is a deficient number, since it is larger than the sum of its proper divisors (6934655).

28813057 is a wasteful number, since it uses less digits than its factorization.

28813057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2568.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 28813057 is about 5367.7795222978. The cubic root of 28813057 is about 306.5700886544.

The spelling of 28813057 in words is "twenty-eight million, eight hundred thirteen thousand, fifty-seven".