7899742208 has 48 divisors (see below), whose sum is σ = 15831486555. Its totient is φ = 3941826560.

The previous prime is 7899742181. The next prime is 7899742243. The reversal of 7899742208 is 8022479987.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 3949871104 + 3949871104 = 62848^2 + 62848^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=62848.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 16088843 + ... + 16089333.

Almost surely, 2^7899742208 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 7899742208

7899742208 is an abundant number, since it is smaller than the sum of its proper divisors (7931744347).

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

7899742208 is an frugal number, since it uses more digits than its factorization.

7899742208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012 (or 493 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 56.

The square root of 7899742208 is about 88880.4939680243. The cubic root of 7899742208 is about 1991.6100374796.

The spelling of 7899742208 in words is "seven billion, eight hundred ninety-nine million, seven hundred forty-two thousand, two hundred eight".