7890955780 has 12 divisors (see below), whose sum is σ = 16571007180. Its totient is φ = 3156382304.

The previous prime is 7890955769. The next prime is 7890955783. The reversal of 7890955780 is 875590987.

It can be written as a sum of positive squares in 2 ways, for example, as 3836068096 + 4054887684 = 61936^2 + 63678^2 .

It is not an unprimeable number, because it can be changed into a prime (7890955783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197273875 + ... + 197273914.

It is an arithmetic number, because the mean of its divisors is an integer number (1380917265).

Almost surely, 2^7890955780 is an apocalyptic number.

It is an amenable number.

7890955780 is an abundant number, since it is smaller than the sum of its proper divisors (8680051400).

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

7890955780 is a wasteful number, since it uses less digits than its factorization.

7890955780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394547798 (or 394547796 counting only the distinct ones).

The product of its (nonzero) digits is 6350400, while the sum is 58.

The square root of 7890955780 is about 88831.0518906536. The cubic root of 7890955780 is about 1990.8713791998.

It can be divided in two parts, 78909 and 55780, that added together give a square (134689 = 367²).

The spelling of 7890955780 in words is "seven billion, eight hundred ninety million, nine hundred fifty-five thousand, seven hundred eighty".