7878992 has 40 divisors (see below), whose sum is σ = 16873920. Its totient is φ = 3534080.

The previous prime is 7878989. The next prime is 7879021. The reversal of 7878992 is 2998787.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 7878992.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15413 + ... + 15915.

It is an arithmetic number, because the mean of its divisors is an integer number (421848).

Almost surely, 2^7878992 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 7878992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8436960).

7878992 is an abundant number, since it is smaller than the sum of its proper divisors (8994928).

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

7878992 is a wasteful number, since it uses less digits than its factorization.

7878992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611 (or 605 counting only the distinct ones).

The product of its digits is 508032, while the sum is 50.

The square root of 7878992 is about 2806.9542212156. The cubic root of 7878992 is about 198.9864724860.

It can be divided in two parts, 787 and 8992, that added together give a palindrome (9779).

The spelling of 7878992 in words is "seven million, eight hundred seventy-eight thousand, nine hundred ninety-two".