3643878320 has 40 divisors (see below), whose sum is σ = 8477545200. Its totient is φ = 1456600320.

The previous prime is 3643878299. The next prime is 3643878341. The reversal of 3643878320 is 238783463.

It is an interprime number because it is at equal distance from previous prime (3643878299) and next prime (3643878341).

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115631 + ... + 143729.

It is an arithmetic number, because the mean of its divisors is an integer number (211938630).

Almost surely, 2^3643878320 is an apocalyptic number.

It is an amenable number.

3643878320 is an abundant number, since it is smaller than the sum of its proper divisors (4833666880).

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

3643878320 is a wasteful number, since it uses less digits than its factorization.

3643878320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29733 (or 29727 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 44.

The square root of 3643878320 is about 60364.5452231689. The cubic root of 3643878320 is about 1538.8204719596.

The spelling of 3643878320 in words is "three billion, six hundred forty-three million, eight hundred seventy-eight thousand, three hundred twenty".