2308640840 has 32 divisors (see below), whose sum is σ = 5666664960. Its totient is φ = 839505600.

The previous prime is 2308640813. The next prime is 2308640879. The reversal of 2308640840 is 480468032.

It is a self number, because there is not a number n which added to its sum of digits gives 2308640840.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2623016 + ... + 2623895.

It is an arithmetic number, because the mean of its divisors is an integer number (177083280).

Almost surely, 2^2308640840 is an apocalyptic number.

2308640840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2308640840 is an abundant number, since it is smaller than the sum of its proper divisors (3358024120).

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

2308640840 is a wasteful number, since it uses less digits than its factorization.

2308640840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5246933 (or 5246929 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 35.

The square root of 2308640840 is about 48048.3177645170. The cubic root of 2308640840 is about 1321.6570939407.

The spelling of 2308640840 in words is "two billion, three hundred eight million, six hundred forty thousand, eight hundred forty".