2621644 has 12 divisors (see below), whose sum is σ = 4599504. Its totient is φ = 1307504.

The previous prime is 2621617. The next prime is 2621669. The reversal of 2621644 is 4461262.

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, 2082 + ... + 3094.

It is an arithmetic number, because the mean of its divisors is an integer number (383292).

2^2621644 is an apocalyptic number.

It is an amenable number.

2621644 is a deficient number, since it is larger than the sum of its proper divisors (1977860).

2621644 is a wasteful number, since it uses less digits than its factorization.

2621644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1664 (or 1662 counting only the distinct ones).

The product of its digits is 2304, while the sum is 25.

The square root of 2621644 is about 1619.1491592809. The cubic root of 2621644 is about 137.8873967675.

The spelling of 2621644 in words is "two million, six hundred twenty-one thousand, six hundred forty-four".