36644418 has 48 divisors (see below), whose sum is σ = 86800896. Its totient is φ = 11122560.

The previous prime is 36644389. The next prime is 36644423. The reversal of 36644418 is 81444663.

36644418 is a `hidden beast` number, since 3 + 6 + 644 + 4 + 1 + 8 = 666.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 7555 + ... + 11417.

It is an arithmetic number, because the mean of its divisors is an integer number (1808352).

Almost surely, 2^36644418 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 36644418, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43400448).

36644418 is an abundant number, since it is smaller than the sum of its proper divisors (50156478).

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

36644418 is a wasteful number, since it uses less digits than its factorization.

36644418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3919 (or 3916 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The square root of 36644418 is about 6053.4633062405. The cubic root of 36644418 is about 332.1512894941.

The spelling of 36644418 in words is "thirty-six million, six hundred forty-four thousand, four hundred eighteen".