7993818 has 24 divisors (see below), whose sum is σ = 19794528. Its totient is φ = 2283912.

The previous prime is 7993801. The next prime is 7993823. The reversal of 7993818 is 8183997.

It is a super-2 number, since 2×7993818² = 127802252434248, which contains 22 as substring.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31596 + ... + 31847.

It is an arithmetic number, because the mean of its divisors is an integer number (824772).

Almost surely, 2^7993818 is an apocalyptic number.

7993818 is an abundant number, since it is smaller than the sum of its proper divisors (11800710).

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

7993818 is a wasteful number, since it uses less digits than its factorization.

7993818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63458 (or 63455 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 7993818 is about 2827.3340800125. The cubic root of 7993818 is about 199.9484700578.

The spelling of 7993818 in words is "seven million, nine hundred ninety-three thousand, eight hundred eighteen".