3621391308 has 48 divisors (see below), whose sum is σ = 9797007360. Its totient is φ = 1154645712.

The previous prime is 3621391303. The next prime is 3621391321. The reversal of 3621391308 is 8031931263.

It is a super-2 number, since 2×3621391308² = 26228950011315901728, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (3621391303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 726460 + ... + 731427.

It is an arithmetic number, because the mean of its divisors is an integer number (204104320).

Almost surely, 2^3621391308 is an apocalyptic number.

It is an amenable number.

3621391308 is an abundant number, since it is smaller than the sum of its proper divisors (6175616052).

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

3621391308 is a wasteful number, since it uses less digits than its factorization.

3621391308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1457923 (or 1457915 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 3621391308 is about 60177.9968759346. The cubic root of 3621391308 is about 1535.6484943950.

The spelling of 3621391308 in words is "three billion, six hundred twenty-one million, three hundred ninety-one thousand, three hundred eight".