36644538 has 32 divisors (see below), whose sum is σ = 84082176. Its totient is φ = 10429488.

The previous prime is 36644501. The next prime is 36644539. The reversal of 36644538 is 83544663.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 36644496 and 36644505.

It is not an unprimeable number, because it can be changed into a prime (36644539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10345 + ... + 13427.

It is an arithmetic number, because the mean of its divisors is an integer number (2627568).

Almost surely, 2^36644538 is an apocalyptic number.

36644538 is an abundant number, since it is smaller than the sum of its proper divisors (47437638).

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

36644538 is a wasteful number, since it uses less digits than its factorization.

36644538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3378.

The product of its digits is 207360, while the sum is 39.

The square root of 36644538 is about 6053.4732179138. The cubic root of 36644538 is about 332.1516520605.

The spelling of 36644538 in words is "thirty-six million, six hundred forty-four thousand, five hundred thirty-eight".