7877790980 has 24 divisors (see below), whose sum is σ = 16713915288. Its totient is φ = 3118629888.

The previous prime is 7877790971. The next prime is 7877791037. The reversal of 7877790980 is 890977787.

It can be written as a sum of positive squares in 4 ways, for example, as 2110299844 + 5767491136 = 45938^2 + 75944^2 .

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, 2028419 + ... + 2032298.

It is an arithmetic number, because the mean of its divisors is an integer number (696413137).

Almost surely, 2^7877790980 is an apocalyptic number.

It is an amenable number.

7877790980 is an abundant number, since it is smaller than the sum of its proper divisors (8836124308).

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

7877790980 is a wasteful number, since it uses less digits than its factorization.

7877790980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4060823 (or 4060821 counting only the distinct ones).

The product of its (nonzero) digits is 12446784, while the sum is 62.

The square root of 7877790980 is about 88756.9207442439. The cubic root of 7877790980 is about 1989.7636125700.

The spelling of 7877790980 in words is "seven billion, eight hundred seventy-seven million, seven hundred ninety thousand, nine hundred eighty".