2640640404 has 24 divisors (see below), whose sum is σ = 6167193088. Its totient is φ = 879399360.

The previous prime is 2640640397. The next prime is 2640640411. The reversal of 2640640404 is 4040460462.

It is an interprime number because it is at equal distance from previous prime (2640640397) and next prime (2640640411).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88177 + ... + 114264.

Almost surely, 2^2640640404 is an apocalyptic number.

It is an amenable number.

2640640404 is an abundant number, since it is smaller than the sum of its proper divisors (3526552684).

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

2640640404 is a wasteful number, since it uses less digits than its factorization.

2640640404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203535 (or 203533 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 30.

The square root of 2640640404 is about 51387.1618597486. The cubic root of 2640640404 is about 1382.1963910752.

The spelling of 2640640404 in words is "two billion, six hundred forty million, six hundred forty thousand, four hundred four".