2120591400 has 96 divisors (see below), whose sum is σ = 6580828800. Its totient is φ = 564889600.

The previous prime is 2120591359. The next prime is 2120591413. The reversal of 2120591400 is 41950212.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1121656 + ... + 1123544.

It is an arithmetic number, because the mean of its divisors is an integer number (68550300).

Almost surely, 2^2120591400 is an apocalyptic number.

2120591400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2120591400 is an abundant number, since it is smaller than the sum of its proper divisors (4460237400).

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

2120591400 is a wasteful number, since it uses less digits than its factorization.

2120591400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3779 (or 3770 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 2120591400 is about 46049.8794786696. The cubic root of 2120591400 is about 1284.7511011917.

The spelling of 2120591400 in words is "two billion, one hundred twenty million, five hundred ninety-one thousand, four hundred".