3221612408 has 64 divisors (see below), whose sum is σ = 7067616000. Its totient is φ = 1376131680.

The previous prime is 3221612377. The next prime is 3221612413. The reversal of 3221612408 is 8042161223.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 906491 + ... + 910037.

It is an arithmetic number, because the mean of its divisors is an integer number (110431500).

Almost surely, 2^3221612408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3221612408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3533808000).

3221612408 is an abundant number, since it is smaller than the sum of its proper divisors (3846003592).

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

3221612408 is a wasteful number, since it uses less digits than its factorization.

3221612408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3905 (or 3887 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 3221612408 is about 56759.2495369697. The cubic root of 3221612408 is about 1476.9226916104.

The spelling of 3221612408 in words is "three billion, two hundred twenty-one million, six hundred twelve thousand, four hundred eight".