2120238990 has 80 divisors (see below), whose sum is σ = 5765340240. Its totient is φ = 559025280.

The previous prime is 2120238983. The next prime is 2120239003. The reversal of 2120238990 is 998320212.

2120238990 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 57385 + ... + 86795.

It is an arithmetic number, because the mean of its divisors is an integer number (72066753).

Almost surely, 2^2120238990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2120238990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2882670120).

2120238990 is an abundant number, since it is smaller than the sum of its proper divisors (3645101250).

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

2120238990 is a wasteful number, since it uses less digits than its factorization.

2120238990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29519 (or 29510 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 2120238990 is about 46046.0529253051. The cubic root of 2120238990 is about 1284.6799285590.

The spelling of 2120238990 in words is "two billion, one hundred twenty million, two hundred thirty-eight thousand, nine hundred ninety".