7939988 has 12 divisors (see below), whose sum is σ = 15880032. Its totient is φ = 3402840.

The previous prime is 7939979. The next prime is 7940011. The reversal of 7939988 is 8899397.

7939988 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141758 + ... + 141813.

It is an arithmetic number, because the mean of its divisors is an integer number (1323336).

Almost surely, 2^7939988 is an apocalyptic number.

It is an amenable number.

7939988 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

7939988 is a wasteful number, since it uses less digits than its factorization.

7939988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283582 (or 283580 counting only the distinct ones).

The product of its digits is 979776, while the sum is 53.

The square root of 7939988 is about 2817.7984313999. The cubic root of 7939988 is about 199.4986442623.

The spelling of 7939988 in words is "seven million, nine hundred thirty-nine thousand, nine hundred eighty-eight".