7878992000 has 256 divisors, whose sum is σ = 21653049600. Its totient is φ = 2827264000.

The previous prime is 7878991993. The next prime is 7878992041. The reversal of 7878992000 is 2998787.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a self number, because there is not a number n which added to its sum of digits gives 7878992000.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15663749 + ... + 15664251.

It is an arithmetic number, because the mean of its divisors is an integer number (84582225).

Almost surely, 2^7878992000 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 7878992000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10826524800).

7878992000 is an abundant number, since it is smaller than the sum of its proper divisors (13774057600).

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

7878992000 is a wasteful number, since it uses less digits than its factorization.

7878992000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632 (or 610 counting only the distinct ones).

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

The square root of 7878992000 is about 88763.6862686538. The cubic root of 7878992000 is about 1989.8647248601.

The spelling of 7878992000 in words is "seven billion, eight hundred seventy-eight million, nine hundred ninety-two thousand".