2120990406 has 32 divisors (see below), whose sum is σ = 4478812800. Its totient is φ = 667751040.

The previous prime is 2120990381. The next prime is 2120990407. The reversal of 2120990406 is 6040990212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120990407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9630 + ... + 65838.

It is an arithmetic number, because the mean of its divisors is an integer number (139962900).

Almost surely, 2^2120990406 is an apocalyptic number.

2120990406 is an abundant number, since it is smaller than the sum of its proper divisors (2357822394).

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

2120990406 is a wasteful number, since it uses less digits than its factorization.

2120990406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56564.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 2120990406 is about 46054.2115989407. The cubic root of 2120990406 is about 1284.8316748232.

The spelling of 2120990406 in words is "two billion, one hundred twenty million, nine hundred ninety thousand, four hundred six".