7978338252 has 72 divisors (see below), whose sum is σ = 20586436416. Its totient is φ = 2604386304.

The previous prime is 7978338223. The next prime is 7978338253. The reversal of 7978338252 is 2528338797.

It is not an unprimeable number, because it can be changed into a prime (7978338253) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1097293 + ... + 1104539.

It is an arithmetic number, because the mean of its divisors is an integer number (285922728).

Almost surely, 2^7978338252 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 7978338252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10293218208).

7978338252 is an abundant number, since it is smaller than the sum of its proper divisors (12608098164).

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

7978338252 is a wasteful number, since it uses less digits than its factorization.

7978338252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7887 (or 7882 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 54.

The square root of 7978338252 is about 89321.5441648878. The cubic root of 7978338252 is about 1998.1932226026.

The spelling of 7978338252 in words is "seven billion, nine hundred seventy-eight million, three hundred thirty-eight thousand, two hundred fifty-two".