2597940840 has 64 divisors (see below), whose sum is σ = 8502356160. Its totient is φ = 629803520.

The previous prime is 2597940823. The next prime is 2597940869. The reversal of 2597940840 is 480497952.

It is a self number, because there is not a number n which added to its sum of digits gives 2597940840.

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 15 ways as a sum of consecutive naturals, for example, 982749 + ... + 985388.

It is an arithmetic number, because the mean of its divisors is an integer number (132849315).

Almost surely, 2^2597940840 is an apocalyptic number.

2597940840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2597940840 is an abundant number, since it is smaller than the sum of its proper divisors (5904415320).

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

2597940840 is a wasteful number, since it uses less digits than its factorization.

2597940840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1968162 (or 1968158 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 48.

The square root of 2597940840 is about 50969.9994114185. Note that the first 3 decimals coincide. The cubic root of 2597940840 is about 1374.7057600696.

The spelling of 2597940840 in words is "two billion, five hundred ninety-seven million, nine hundred forty thousand, eight hundred forty".