2120788040 has 64 divisors (see below), whose sum is σ = 5545929600. Its totient is φ = 714797568.

The previous prime is 2120787971. The next prime is 2120788069. The reversal of 2120788040 is 408870212.

It is a junction number, because it is equal to n+sod(n) for n = 2120787988 and 2120788006.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47669 + ... + 80708.

It is an arithmetic number, because the mean of its divisors is an integer number (86655150).

Almost surely, 2^2120788040 is an apocalyptic number.

2120788040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2120788040 is an abundant number, since it is smaller than the sum of its proper divisors (3425141560).

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

2120788040 is a wasteful number, since it uses less digits than its factorization.

2120788040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128454 (or 128450 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 2120788040 is about 46052.0145053395. The cubic root of 2120788040 is about 1284.7908111280.

The spelling of 2120788040 in words is "two billion, one hundred twenty million, seven hundred eighty-eight thousand, forty".