3644297388 has 36 divisors (see below), whose sum is σ = 9460949680. Its totient is φ = 1181933856.

The previous prime is 3644297387. The next prime is 3644297417. The reversal of 3644297388 is 8837924463.

3644297388 is a `hidden beast` number, since 36 + 442 + 97 + 3 + 88 = 666.

3644297388 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (3644297387) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1366648 + ... + 1369311.

Almost surely, 2^3644297388 is an apocalyptic number.

It is an amenable number.

3644297388 is an abundant number, since it is smaller than the sum of its proper divisors (5816652292).

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

3644297388 is a wasteful number, since it uses less digits than its factorization.

3644297388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2736006 (or 2736001 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 54.

The square root of 3644297388 is about 60368.0162668942. The cubic root of 3644297388 is about 1538.8794609123.

The spelling of 3644297388 in words is "three billion, six hundred forty-four million, two hundred ninety-seven thousand, three hundred eighty-eight".