2391644 has 12 divisors (see below), whose sum is σ = 4405800. Its totient is φ = 1132848.

The previous prime is 2391637. The next prime is 2391671. The reversal of 2391644 is 4461932.

It is a super-2 number, since 2×2391644² = 11439922045472, 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 3 ways as a sum of consecutive naturals, for example, 15659 + ... + 15810.

It is an arithmetic number, because the mean of its divisors is an integer number (367150).

2^2391644 is an apocalyptic number.

It is an amenable number.

2391644 is a deficient number, since it is larger than the sum of its proper divisors (2014156).

2391644 is a wasteful number, since it uses less digits than its factorization.

2391644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31492 (or 31490 counting only the distinct ones).

The product of its digits is 5184, while the sum is 29.

The square root of 2391644 is about 1546.4940995684. The cubic root of 2391644 is about 133.7310265106.

The spelling of 2391644 in words is "two million, three hundred ninety-one thousand, six hundred forty-four".