167978816 has 28 divisors (see below), whose sum is σ = 342346788. Its totient is φ = 81718272.

The previous prime is 167978813. The next prime is 167978831. The reversal of 167978816 is 618879761.

It can be written as a sum of positive squares in 2 ways, for example, as 98089216 + 69889600 = 9904^2 + 8360^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (167978813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33101 + ... + 37836.

It is an arithmetic number, because the mean of its divisors is an integer number (12226671).

Almost surely, 2^167978816 is an apocalyptic number.

167978816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

167978816 is an abundant number, since it is smaller than the sum of its proper divisors (174367972).

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

167978816 is an equidigital number, since it uses as much as digits as its factorization.

167978816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70986 (or 70976 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 53.

The square root of 167978816 is about 12960.6641805117. The cubic root of 167978816 is about 551.7616418213.

The spelling of 167978816 in words is "one hundred sixty-seven million, nine hundred seventy-eight thousand, eight hundred sixteen".