2640630880 has 48 divisors (see below), whose sum is σ = 6251484960. Its totient is φ = 1054052352.

The previous prime is 2640630877. The next prime is 2640630907. The reversal of 2640630880 is 880360462.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60976 + ... + 94864.

It is an arithmetic number, because the mean of its divisors is an integer number (130239270).

Almost surely, 2^2640630880 is an apocalyptic number.

2640630880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2640630880 is an abundant number, since it is smaller than the sum of its proper divisors (3610854080).

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

2640630880 is a wasteful number, since it uses less digits than its factorization.

2640630880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34391 (or 34383 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 2640630880 is about 51387.0691906048. The cubic root of 2640630880 is about 1382.1947293502.

The spelling of 2640630880 in words is "two billion, six hundred forty million, six hundred thirty thousand, eight hundred eighty".