36639728 has 20 divisors (see below), whose sum is σ = 71332488. Its totient is φ = 18231360.

The previous prime is 36639679. The next prime is 36639739. The reversal of 36639728 is 82793663.

36639728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 2051 + ... + 8802.

Almost surely, 2^36639728 is an apocalyptic number.

It is an amenable number.

36639728 is a deficient number, since it is larger than the sum of its proper divisors (34692760).

36639728 is a wasteful number, since it uses less digits than its factorization.

36639728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11072 (or 11066 counting only the distinct ones).

The product of its digits is 326592, while the sum is 44.

The square root of 36639728 is about 6053.0759122945. The cubic root of 36639728 is about 332.1371185680.

The spelling of 36639728 in words is "thirty-six million, six hundred thirty-nine thousand, seven hundred twenty-eight".