2640279288 has 32 divisors (see below), whose sum is σ = 6625071360. Its totient is φ = 876843360.

The previous prime is 2640279259. The next prime is 2640279293. The reversal of 2640279288 is 8829720462.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

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, 196470 + ... + 209477.

It is an arithmetic number, because the mean of its divisors is an integer number (207033480).

Almost surely, 2^2640279288 is an apocalyptic number.

It is an amenable number.

2640279288 is an abundant number, since it is smaller than the sum of its proper divisors (3984792072).

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

2640279288 is a wasteful number, since it uses less digits than its factorization.

2640279288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406227 (or 406223 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 48.

The square root of 2640279288 is about 51383.6480604482. The cubic root of 2640279288 is about 1382.1333816141.

The spelling of 2640279288 in words is "two billion, six hundred forty million, two hundred seventy-nine thousand, two hundred eighty-eight".