36639408 has 80 divisors (see below), whose sum is σ = 103493376. Its totient is φ = 11101440.

The previous prime is 36639371. The next prime is 36639409. The reversal of 36639408 is 80493663.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (36639409) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 43891 + ... + 44717.

Almost surely, 2^36639408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 36639408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51746688).

36639408 is an abundant number, since it is smaller than the sum of its proper divisors (66853968).

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

36639408 is a wasteful number, since it uses less digits than its factorization.

36639408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922 (or 916 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 39.

The square root of 36639408 is about 6053.0494793947. The cubic root of 36639408 is about 332.1361516377.

The spelling of 36639408 in words is "thirty-six million, six hundred thirty-nine thousand, four hundred eight".