2644690 has 32 divisors (see below), whose sum is σ = 5163264. Its totient is φ = 971520.

The previous prime is 2644687. The next prime is 2644709. The reversal of 2644690 is 964462.

It is a super-2 number, since 2×2644690² = 13988770392200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7825 + ... + 8155.

It is an arithmetic number, because the mean of its divisors is an integer number (161352).

2^2644690 is an apocalyptic number.

2644690 is a deficient number, since it is larger than the sum of its proper divisors (2518574).

2644690 is a wasteful number, since it uses less digits than its factorization.

2644690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 2644690 is about 1626.2502882398. The cubic root of 2644690 is about 138.2902593266.

The spelling of 2644690 in words is "two million, six hundred forty-four thousand, six hundred ninety".