7988740 has 24 divisors (see below), whose sum is σ = 17660160. Its totient is φ = 3027168.

The previous prime is 7988723. The next prime is 7988741. The reversal of 7988740 is 478897.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (7988741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10132 + ... + 10891.

It is an arithmetic number, because the mean of its divisors is an integer number (735840).

Almost surely, 2^7988740 is an apocalyptic number.

It is an amenable number.

7988740 is an abundant number, since it is smaller than the sum of its proper divisors (9671420).

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

7988740 is a wasteful number, since it uses less digits than its factorization.

7988740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21051 (or 21049 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 7988740 is about 2826.4359182546. The cubic root of 7988740 is about 199.9061226087.

The spelling of 7988740 in words is "seven million, nine hundred eighty-eight thousand, seven hundred forty".