2120402988 has 96 divisors (see below), whose sum is σ = 6013405440. Its totient is φ = 640800000.

The previous prime is 2120402987. The next prime is 2120403031. The reversal of 2120402988 is 8892040212.

It is a super-2 number, since 2×2120402988² = 8992217663038656288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (2120402987) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 474163 + ... + 478613.

It is an arithmetic number, because the mean of its divisors is an integer number (62639640).

Almost surely, 2^2120402988 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2120402988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3006702720).

2120402988 is an abundant number, since it is smaller than the sum of its proper divisors (3893002452).

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

2120402988 is a wasteful number, since it uses less digits than its factorization.

2120402988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4876 (or 4868 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 2120402988 is about 46047.8336949742. The cubic root of 2120402988 is about 1284.7130505338.

The spelling of 2120402988 in words is "two billion, one hundred twenty million, four hundred two thousand, nine hundred eighty-eight".