28324857 has 16 divisors (see below), whose sum is σ = 41418432. Its totient is φ = 17075520.

The previous prime is 28324847. The next prime is 28324859. The reversal of 28324857 is 75842382.

It is not a de Polignac number, because 28324857 - 2⁷ = 28324729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28324859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4323 + ... + 8679.

It is an arithmetic number, because the mean of its divisors is an integer number (2588652).

Almost surely, 2^28324857 is an apocalyptic number.

It is an amenable number.

28324857 is a deficient number, since it is larger than the sum of its proper divisors (13093575).

28324857 is a wasteful number, since it uses less digits than its factorization.

28324857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4568.

The product of its digits is 107520, while the sum is 39.

The square root of 28324857 is about 5322.1102017903. The cubic root of 28324857 is about 304.8287383950.

The spelling of 28324857 in words is "twenty-eight million, three hundred twenty-four thousand, eight hundred fifty-seven".