7978794252 has 96 divisors (see below), whose sum is σ = 21893432064. Its totient is φ = 2229638400.

The previous prime is 7978794209. The next prime is 7978794269. The reversal of 7978794252 is 2524978797.

It is a super-2 number, since 2×7978794252² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2625678 + ... + 2628714.

It is an arithmetic number, because the mean of its divisors is an integer number (228056584).

Almost surely, 2^7978794252 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 7978794252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10946716032).

7978794252 is an abundant number, since it is smaller than the sum of its proper divisors (13914637812).

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

7978794252 is a wasteful number, since it uses less digits than its factorization.

7978794252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4599 (or 4597 counting only the distinct ones).

The product of its digits is 17781120, while the sum is 60.

The square root of 7978794252 is about 89324.0967040809. The cubic root of 7978794252 is about 1998.2312906280.

The spelling of 7978794252 in words is "seven billion, nine hundred seventy-eight million, seven hundred ninety-four thousand, two hundred fifty-two".