28597065 has 16 divisors (see below), whose sum is σ = 52291968. Its totient is φ = 13072896.

The previous prime is 28597031. The next prime is 28597081. The reversal of 28597065 is 56079582.

It is not a de Polignac number, because 28597065 - 2⁶ = 28597001 is a prime.

It is a super-2 number, since 2×28597065² = 1635584253228450, which contains 22 as substring.

It is an unprimeable number.

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, 136072 + ... + 136281.

It is an arithmetic number, because the mean of its divisors is an integer number (3268248).

Almost surely, 2^28597065 is an apocalyptic number.

It is an amenable number.

28597065 is a deficient number, since it is larger than the sum of its proper divisors (23694903).

28597065 is a wasteful number, since it uses less digits than its factorization.

28597065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272368.

The product of its (nonzero) digits is 151200, while the sum is 42.

The square root of 28597065 is about 5347.6223688664. The cubic root of 28597065 is about 305.8021169243.

The spelling of 28597065 in words is "twenty-eight million, five hundred ninety-seven thousand, sixty-five".