2120780740 has 24 divisors (see below), whose sum is σ = 4796227800. Its totient is φ = 783057408.

The previous prime is 2120780737. The next prime is 2120780771. The reversal of 2120780740 is 470870212.

It can be written as a sum of positive squares in 4 ways, for example, as 4596736 + 2116184004 = 2144^2 + 46002^2 .

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, 4078165 + ... + 4078684.

It is an arithmetic number, because the mean of its divisors is an integer number (199842825).

Almost surely, 2^2120780740 is an apocalyptic number.

2120780740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2120780740 is an abundant number, since it is smaller than the sum of its proper divisors (2675447060).

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

2120780740 is a wasteful number, since it uses less digits than its factorization.

2120780740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8156871 (or 8156869 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 2120780740 is about 46051.9352470664. The cubic root of 2120780740 is about 1284.7893369930.

The spelling of 2120780740 in words is "two billion, one hundred twenty million, seven hundred eighty thousand, seven hundred forty".