2622640 has 20 divisors (see below), whose sum is σ = 6097824. Its totient is φ = 1049024.

The previous prime is 2622637. The next prime is 2622679. The reversal of 2622640 is 462262.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a d-powerful number, because it can be written as 2⁹ + 6³ + 2¹⁹ + 2²¹ + 6³ + 4⁴ + 0 .

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, 16312 + ... + 16471.

2^2622640 is an apocalyptic number.

2622640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2622640 is an abundant number, since it is smaller than the sum of its proper divisors (3475184).

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

2622640 is a wasteful number, since it uses less digits than its factorization.

2622640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32796 (or 32790 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 2622640 is about 1619.4566990198. The cubic root of 2622640 is about 137.9048563538.

The spelling of 2622640 in words is "two million, six hundred twenty-two thousand, six hundred forty".