28964865 has 16 divisors (see below), whose sum is σ = 46420416. Its totient is φ = 15422400.

The previous prime is 28964857. The next prime is 28964891. The reversal of 28964865 is 56846982.

It is a happy number.

It is not a de Polignac number, because 28964865 - 2³ = 28964857 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10975 + ... + 13355.

It is an arithmetic number, because the mean of its divisors is an integer number (2901276).

Almost surely, 2^28964865 is an apocalyptic number.

It is an amenable number.

28964865 is a deficient number, since it is larger than the sum of its proper divisors (17455551).

28964865 is a wasteful number, since it uses less digits than its factorization.

28964865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3200.

The product of its digits is 829440, while the sum is 48.

The square root of 28964865 is about 5381.9016156002. The cubic root of 28964865 is about 307.1075567352.

The spelling of 28964865 in words is "twenty-eight million, nine hundred sixty-four thousand, eight hundred sixty-five".