7878376990 has 32 divisors (see below), whose sum is σ = 16142893056. Its totient is φ = 2740304160.

The previous prime is 7878376951. The next prime is 7878376993. The reversal of 7878376990 is 996738787.

It is a super-2 number, since 2×7878376990² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7878376993) 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, 1554462 + ... + 1559521.

It is an arithmetic number, because the mean of its divisors is an integer number (504465408).

Almost surely, 2^7878376990 is an apocalyptic number.

7878376990 is an abundant number, since it is smaller than the sum of its proper divisors (8264516066).

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

7878376990 is a wasteful number, since it uses less digits than its factorization.

7878376990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3114024.

The product of its (nonzero) digits is 32006016, while the sum is 64.

The square root of 7878376990 is about 88760.2218902139. The cubic root of 7878376990 is about 1989.8129492629.

The spelling of 7878376990 in words is "seven billion, eight hundred seventy-eight million, three hundred seventy-six thousand, nine hundred ninety".