7978338798 has 16 divisors (see below), whose sum is σ = 16105806720. Its totient is φ = 2634591416.

The previous prime is 7978338793. The next prime is 7978338803. The reversal of 7978338798 is 8978338797.

It is an interprime number because it is at equal distance from previous prime (7978338793) and next prime (7978338803).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7978338791) 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, 6213018 + ... + 6214301.

It is an arithmetic number, because the mean of its divisors is an integer number (1006612920).

Almost surely, 2^7978338798 is an apocalyptic number.

7978338798 is an abundant number, since it is smaller than the sum of its proper divisors (8127467922).

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

7978338798 is a wasteful number, since it uses less digits than its factorization.

7978338798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12427431.

The product of its digits is 128024064, while the sum is 69.

The square root of 7978338798 is about 89321.5472212612. The cubic root of 7978338798 is about 1998.1932681849.

Subtracting 7978338798 from its reverse (8978338797), we obtain a palindrome (999999999).

The spelling of 7978338798 in words is "seven billion, nine hundred seventy-eight million, three hundred thirty-eight thousand, seven hundred ninety-eight".