78172968 has 64 divisors (see below), whose sum is σ = 201484800. Its totient is φ = 25260480.

The previous prime is 78172957. The next prime is 78172993. The reversal of 78172968 is 86927187.

It is a super-2 number, since 2×78172968² = 12222025851858048, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217573 + ... + 217931.

It is an arithmetic number, because the mean of its divisors is an integer number (3148200).

Almost surely, 2^78172968 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 78172968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100742400).

78172968 is an abundant number, since it is smaller than the sum of its proper divisors (123311832).

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

78172968 is a wasteful number, since it uses less digits than its factorization.

78172968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622 (or 618 counting only the distinct ones).

The product of its digits is 338688, while the sum is 48.

The square root of 78172968 is about 8841.5478282934. The cubic root of 78172968 is about 427.5814611701.

The spelling of 78172968 in words is "seventy-eight million, one hundred seventy-two thousand, nine hundred sixty-eight".