3221907904 has 56 divisors (see below), whose sum is σ = 6706209600. Its totient is φ = 1534012416.

The previous prime is 3221907869. The next prime is 3221907937. The reversal of 3221907904 is 4097091223.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

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, 96822 + ... + 125770.

Almost surely, 2^3221907904 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 3221907904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3353104800).

3221907904 is an abundant number, since it is smaller than the sum of its proper divisors (3484301696).

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

3221907904 is a wasteful number, since it uses less digits than its factorization.

3221907904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29045 (or 29035 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 3221907904 is about 56761.8525420022. The cubic root of 3221907904 is about 1476.9678461634.

The spelling of 3221907904 in words is "three billion, two hundred twenty-one million, nine hundred seven thousand, nine hundred four".