78970992 has 80 divisors (see below), whose sum is σ = 216712320. Its totient is φ = 24710400.

The previous prime is 78970979. The next prime is 78970993. The reversal of 78970992 is 29907987.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78970993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119142 + ... + 119802.

It is an arithmetic number, because the mean of its divisors is an integer number (2708904).

Almost surely, 2^78970992 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 78970992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108356160).

78970992 is an abundant number, since it is smaller than the sum of its proper divisors (137741328).

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

78970992 is a wasteful number, since it uses less digits than its factorization.

78970992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822 (or 816 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 51.

The square root of 78970992 is about 8886.5624399989. The cubic root of 78970992 is about 429.0315178348.

The spelling of 78970992 in words is "seventy-eight million, nine hundred seventy thousand, nine hundred ninety-two".