7988660 has 12 divisors (see below), whose sum is σ = 16776228. Its totient is φ = 3195456.

The previous prime is 7988641. The next prime is 7988663. The reversal of 7988660 is 668897.

It can be written as a sum of positive squares in 2 ways, for example, as 6360484 + 1628176 = 2522^2 + 1276^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7988663) 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, 199697 + ... + 199736.

It is an arithmetic number, because the mean of its divisors is an integer number (1398019).

Almost surely, 2^7988660 is an apocalyptic number.

It is an amenable number.

7988660 is an abundant number, since it is smaller than the sum of its proper divisors (8787568).

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

7988660 is a wasteful number, since it uses less digits than its factorization.

7988660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399442 (or 399440 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 7988660 is about 2826.4217661205. The cubic root of 7988660 is about 199.9054553136.

The spelling of 7988660 in words is "seven million, nine hundred eighty-eight thousand, six hundred sixty".