36644240 has 20 divisors (see below), whose sum is σ = 85198044. Its totient is φ = 14657664.

The previous prime is 36644239. The next prime is 36644281. The reversal of 36644240 is 4244663.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8596624 + 28047616 = 2932^2 + 5296^2 .

It is a tau number, because it is divible by the number of its divisors (20).

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 3 ways as a sum of consecutive naturals, for example, 228947 + ... + 229106.

Almost surely, 2^36644240 is an apocalyptic number.

It is an amenable number.

36644240 is an abundant number, since it is smaller than the sum of its proper divisors (48553804).

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

36644240 is a wasteful number, since it uses less digits than its factorization.

36644240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458066 (or 458060 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 29.

The square root of 36644240 is about 6053.4486038951. The cubic root of 36644240 is about 332.1507516857.

The spelling of 36644240 in words is "thirty-six million, six hundred forty-four thousand, two hundred forty".