28916065 has 16 divisors (see below), whose sum is σ = 37089360. Its totient is φ = 21565440.

The previous prime is 28916057. The next prime is 28916071. The reversal of 28916065 is 56061982.

It can be written as a sum of positive squares in 8 ways, for example, as 1164241 + 27751824 = 1079^2 + 5268^2 .

It is not a de Polignac number, because 28916065 - 2³ = 28916057 is a prime.

It is a super-2 number, since 2×28916065² = 1672277630168450, 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, 7705 + ... + 10825.

It is an arithmetic number, because the mean of its divisors is an integer number (2318085).

Almost surely, 2^28916065 is an apocalyptic number.

It is an amenable number.

28916065 is a deficient number, since it is larger than the sum of its proper divisors (8173295).

28916065 is a wasteful number, since it uses less digits than its factorization.

28916065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3252.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 28916065 is about 5377.3659908918. The cubic root of 28916065 is about 306.9349881966.

The spelling of 28916065 in words is "twenty-eight million, nine hundred sixteen thousand, sixty-five".