7890984 has 24 divisors (see below), whose sum is σ = 21371610. Its totient is φ = 2630304.

The previous prime is 7890979. The next prime is 7890989. The reversal of 7890984 is 4890987.

It is an interprime number because it is at equal distance from previous prime (7890979) and next prime (7890989).

It can be written as a sum of positive squares in only one way, i.e., 4088484 + 3802500 = 2022^2 + 1950^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (7890989) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 54727 + ... + 54870.

Almost surely, 2^7890984 is an apocalyptic number.

It is an amenable number.

7890984 is an abundant number, since it is smaller than the sum of its proper divisors (13480626).

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

7890984 is a wasteful number, since it uses less digits than its factorization.

7890984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109609 (or 109602 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 7890984 is about 2809.0895322150. The cubic root of 7890984 is about 199.0873752479.

The spelling of 7890984 in words is "seven million, eight hundred ninety thousand, nine hundred eighty-four".