28836665 has 32 divisors (see below), whose sum is σ = 41997312. Its totient is φ = 18720000.

The previous prime is 28836631. The next prime is 28836671. The reversal of 28836665 is 56663882.

28836665 = 352² + 353² + ... + 506².

It is not a de Polignac number, because 28836665 - 2¹⁰ = 28835641 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21515 + ... + 22815.

It is an arithmetic number, because the mean of its divisors is an integer number (1312416).

Almost surely, 2^28836665 is an apocalyptic number.

It is an amenable number.

28836665 is a deficient number, since it is larger than the sum of its proper divisors (13160647).

28836665 is a wasteful number, since it uses less digits than its factorization.

28836665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1361.

The product of its digits is 414720, while the sum is 44.

The square root of 28836665 is about 5369.9781191361. The cubic root of 28836665 is about 306.6537952747.

The spelling of 28836665 in words is "twenty-eight million, eight hundred thirty-six thousand, six hundred sixty-five".