36639690 has 32 divisors (see below), whose sum is σ = 91760256. Its totient is φ = 9345600.

The previous prime is 36639679. The next prime is 36639739. The reversal of 36639690 is 9693663.

36639690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×36639690² = 2684933766592200, 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, 25861 + ... + 27240.

It is an arithmetic number, because the mean of its divisors is an integer number (2867508).

Almost surely, 2^36639690 is an apocalyptic number.

36639690 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

36639690 is an abundant number, since it is smaller than the sum of its proper divisors (55120566).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

36639690 is a wasteful number, since it uses less digits than its factorization.

36639690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53134.

The product of its (nonzero) digits is 157464, while the sum is 42.

The square root of 36639690 is about 6053.0727733937. The cubic root of 36639690 is about 332.1370037453.

The spelling of 36639690 in words is "thirty-six million, six hundred thirty-nine thousand, six hundred ninety".