2931664 has 30 divisors (see below), whose sum is σ = 5875430. Its totient is φ = 1416960.

The previous prime is 2931653. The next prime is 2931671. The reversal of 2931664 is 4661392.

It can be written as a sum of positive squares in 3 ways, for example, as 14400 + 2917264 = 120^2 + 1708^2 .

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26842 + ... + 26950.

2^2931664 is an apocalyptic number.

It is an amenable number.

2931664 is an abundant number, since it is smaller than the sum of its proper divisors (2943766).

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

2931664 is a wasteful number, since it uses less digits than its factorization.

2931664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199 (or 152 counting only the distinct ones).

The product of its digits is 7776, while the sum is 31.

The square root of 2931664 is about 1712.2102674613. The cubic root of 2931664 is about 143.1214512573.

The spelling of 2931664 in words is "two million, nine hundred thirty-one thousand, six hundred sixty-four".