3621813984 has 72 divisors (see below), whose sum is σ = 10518711840. Its totient is φ = 1181580288.

The previous prime is 3621813983. The next prime is 3621813997. The reversal of 3621813984 is 4893181263.

3621813984 is a `hidden beast` number, since 3 + 621 + 8 + 13 + 9 + 8 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3621813983) 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, 120249 + ... + 147320.

It is an arithmetic number, because the mean of its divisors is an integer number (146093220).

Almost surely, 2^3621813984 is an apocalyptic number.

It is an amenable number.

3621813984 is an abundant number, since it is smaller than the sum of its proper divisors (6896897856).

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

3621813984 is a wasteful number, since it uses less digits than its factorization.

3621813984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267632 (or 267621 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 3621813984 is about 60181.5086550678. The cubic root of 3621813984 is about 1535.7082372265.

The spelling of 3621813984 in words is "three billion, six hundred twenty-one million, eight hundred thirteen thousand, nine hundred eighty-four".