3640044440 has 16 divisors (see below), whose sum is σ = 8190100080. Its totient is φ = 1456017760.

The previous prime is 3640044413. The next prime is 3640044461. The reversal of 3640044440 is 444400463.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45500516 + ... + 45500595.

It is an arithmetic number, because the mean of its divisors is an integer number (511881255).

Almost surely, 2^3640044440 is an apocalyptic number.

It is an amenable number.

3640044440 is an abundant number, since it is smaller than the sum of its proper divisors (4550055640).

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

3640044440 is a wasteful number, since it uses less digits than its factorization.

3640044440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91001122 (or 91001118 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 29.

The square root of 3640044440 is about 60332.7808077831. The cubic root of 3640044440 is about 1538.2805963275.

The spelling of 3640044440 in words is "three billion, six hundred forty million, forty-four thousand, four hundred forty".