7939986 has 48 divisors (see below), whose sum is σ = 17830560. Its totient is φ = 2350080.

The previous prime is 7939979. The next prime is 7940011. The reversal of 7939986 is 6899397.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32826 + ... + 33066.

It is an arithmetic number, because the mean of its divisors is an integer number (371470).

Almost surely, 2^7939986 is an apocalyptic number.

7939986 is an abundant number, since it is smaller than the sum of its proper divisors (9890574).

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

7939986 is a wasteful number, since it uses less digits than its factorization.

7939986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299 (or 282 counting only the distinct ones).

The product of its digits is 734832, while the sum is 51.

The square root of 7939986 is about 2817.7980765129. The cubic root of 7939986 is about 199.4986275117.

The spelling of 7939986 in words is "seven million, nine hundred thirty-nine thousand, nine hundred eighty-six".