7998489 has 6 divisors (see below), whose sum is σ = 11553386. Its totient is φ = 5332320.

The previous prime is 7998481. The next prime is 7998491. The reversal of 7998489 is 9848997.

7998489 is a `hidden beast` number, since 79 + 98 + 489 = 666.

It can be written as a sum of positive squares in only one way, i.e., 7371225 + 627264 = 2715^2 + 792^2 .

It is not a de Polignac number, because 7998489 - 2³ = 7998481 is a prime.

It is a Duffinian number.

7998489 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7998481) 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, 444352 + ... + 444369.

Almost surely, 2^7998489 is an apocalyptic number.

It is an amenable number.

7998489 is a deficient number, since it is larger than the sum of its proper divisors (3554897).

7998489 is a wasteful number, since it uses less digits than its factorization.

7998489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888727 (or 888724 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 54.

The square root of 7998489 is about 2828.1600025458. The cubic root of 7998489 is about 199.9874075405.

The spelling of 7998489 in words is "seven million, nine hundred ninety-eight thousand, four hundred eighty-nine".