7993986 has 80 divisors (see below), whose sum is σ = 21645120. Its totient is φ = 1916640.

The previous prime is 7993967. The next prime is 7993987. The reversal of 7993986 is 6893997.

Its product of digits (734832) is a multiple of the sum of its prime divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7993987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 614916 + ... + 614928.

It is an arithmetic number, because the mean of its divisors is an integer number (270564).

Almost surely, 2^7993986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7993986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10822560).

7993986 is an abundant number, since it is smaller than the sum of its proper divisors (13651134).

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

7993986 is a wasteful number, since it uses less digits than its factorization.

7993986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69 (or 36 counting only the distinct ones).

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

The square root of 7993986 is about 2827.3637898226. The cubic root of 7993986 is about 199.9498707697.

The spelling of 7993986 in words is "seven million, nine hundred ninety-three thousand, nine hundred eighty-six".