78862992 has 80 divisors (see below), whose sum is σ = 224152320. Its totient is φ = 23740416.

The previous prime is 78862969. The next prime is 78862997. The reversal of 78862992 is 29926887.

It is a happy number.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (78862997) 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, 27984 + ... + 30672.

It is an arithmetic number, because the mean of its divisors is an integer number (2801904).

Almost surely, 2^78862992 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 78862992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112076160).

78862992 is an abundant number, since it is smaller than the sum of its proper divisors (145289328).

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

78862992 is a wasteful number, since it uses less digits than its factorization.

78862992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2760 (or 2754 counting only the distinct ones).

The product of its digits is 870912, while the sum is 51.

The square root of 78862992 is about 8880.4837706062. The cubic root of 78862992 is about 428.8358487609.

It can be divided in two parts, 7886 and 2992, that added together give a triangular number (10878 = T₁₄₇).

The spelling of 78862992 in words is "seventy-eight million, eight hundred sixty-two thousand, nine hundred ninety-two".