5921664 has 64 divisors (see below), whose sum is σ = 17984640. Its totient is φ = 1691136.

The previous prime is 5921639. The next prime is 5921677. The reversal of 5921664 is 4661295.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×5921664² = 70132209057792, which contains 22 as substring.

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, 1587 + ... + 3789.

It is an arithmetic number, because the mean of its divisors is an integer number (281010).

Almost surely, 2^5921664 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 5921664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8992320).

5921664 is an abundant number, since it is smaller than the sum of its proper divisors (12062976).

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

5921664 is a wasteful number, since it uses less digits than its factorization.

5921664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2227 (or 2215 counting only the distinct ones).

The product of its digits is 12960, while the sum is 33.

The square root of 5921664 is about 2433.4469379873. The cubic root of 5921664 is about 180.9177816097.

The spelling of 5921664 in words is "five million, nine hundred twenty-one thousand, six hundred sixty-four".