2120649040 has 20 divisors (see below), whose sum is σ = 4930509204. Its totient is φ = 848259584.

The previous prime is 2120649031. The next prime is 2120649073. The reversal of 2120649040 is 409460212.

It can be written as a sum of positive squares in 2 ways, for example, as 267518736 + 1853130304 = 16356^2 + 43048^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13253977 + ... + 13254136.

Almost surely, 2^2120649040 is an apocalyptic number.

2120649040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2120649040 is an abundant number, since it is smaller than the sum of its proper divisors (2809860164).

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

2120649040 is a wasteful number, since it uses less digits than its factorization.

2120649040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26508126 (or 26508120 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 2120649040 is about 46050.5053175315. The cubic root of 2120649040 is about 1284.7627414009.

The spelling of 2120649040 in words is "two billion, one hundred twenty million, six hundred forty-nine thousand, forty".