7920439072 has 96 divisors (see below), whose sum is σ = 19279475712. Its totient is φ = 3119053824.

The previous prime is 7920439063. The next prime is 7920439073. The reversal of 7920439072 is 2709340297.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (7920439073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 643278 + ... + 655474.

It is an arithmetic number, because the mean of its divisors is an integer number (200827872).

Almost surely, 2^7920439072 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 7920439072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9639737856).

7920439072 is an abundant number, since it is smaller than the sum of its proper divisors (11359036640).

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

7920439072 is a wasteful number, since it uses less digits than its factorization.

7920439072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12450 (or 12442 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 43.

The square root of 7920439072 is about 88996.8486633094. The cubic root of 7920439072 is about 1993.3478214577.

The spelling of 7920439072 in words is "seven billion, nine hundred twenty million, four hundred thirty-nine thousand, seventy-two".