7991380 has 24 divisors (see below), whose sum is σ = 16837632. Its totient is φ = 3185952.

The previous prime is 7991369. The next prime is 7991407. The reversal of 7991380 is 831997.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8829 + ... + 9691.

It is an arithmetic number, because the mean of its divisors is an integer number (701568).

Almost surely, 2^7991380 is an apocalyptic number.

It is an amenable number.

7991380 is an abundant number, since it is smaller than the sum of its proper divisors (8846252).

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

7991380 is a wasteful number, since it uses less digits than its factorization.

7991380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1335 (or 1333 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 7991380 is about 2826.9028989337. The cubic root of 7991380 is about 199.9281408511.

The spelling of 7991380 in words is "seven million, nine hundred ninety-one thousand, three hundred eighty".