4391664 has 20 divisors (see below), whose sum is σ = 11345256. Its totient is φ = 1463872.

The previous prime is 4391659. The next prime is 4391671. The reversal of 4391664 is 4661934.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45699 + ... + 45794.

Almost surely, 2^4391664 is an apocalyptic number.

It is an amenable number.

4391664 is an abundant number, since it is smaller than the sum of its proper divisors (6953592).

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

4391664 is a wasteful number, since it uses less digits than its factorization.

4391664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91504 (or 91498 counting only the distinct ones).

The product of its digits is 15552, while the sum is 33.

The square root of 4391664 is about 2095.6297382887. The cubic root of 4391664 is about 163.7607059411.

The spelling of 4391664 in words is "four million, three hundred ninety-one thousand, six hundred sixty-four".