7939940480 has 64 divisors (see below), whose sum is σ = 19149571800. Its totient is φ = 3147841536.

The previous prime is 7939940471. The next prime is 7939940483. The reversal of 7939940480 is 840499397.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4187642944 + 3752297536 = 64712^2 + 61256^2 .

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (7939940483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17426 + ... + 127214.

Almost surely, 2^7939940480 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 7939940480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9574785900).

7939940480 is an abundant number, since it is smaller than the sum of its proper divisors (11209631320).

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

7939940480 is a wasteful number, since it uses less digits than its factorization.

7939940480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109921 (or 109909 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 53.

The square root of 7939940480 is about 89106.3436574524. The cubic root of 7939940480 is about 1994.9824626863.

The spelling of 7939940480 in words is "seven billion, nine hundred thirty-nine million, nine hundred forty thousand, four hundred eighty".