7920744240 has 40 divisors (see below), whose sum is σ = 24554307888. Its totient is φ = 2112198400.

The previous prime is 7920744239. The next prime is 7920744259. The reversal of 7920744240 is 424470297.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16501311 + ... + 16501790.

Almost surely, 2^7920744240 is an apocalyptic number.

It is an amenable number.

7920744240 is an abundant number, since it is smaller than the sum of its proper divisors (16633563648).

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

7920744240 is a wasteful number, since it uses less digits than its factorization.

7920744240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33003117 (or 33003111 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 39.

The square root of 7920744240 is about 88998.5631344686. The cubic root of 7920744240 is about 1993.3734218127.

The spelling of 7920744240 in words is "seven billion, nine hundred twenty million, seven hundred forty-four thousand, two hundred forty".