7988985 has 12 divisors (see below), whose sum is σ = 13847652. Its totient is φ = 4260768.

The previous prime is 7988983. The next prime is 7988993. The reversal of 7988985 is 5898897.

It can be written as a sum of positive squares in 2 ways, for example, as 5517801 + 2471184 = 2349^2 + 1572^2 .

It is not a de Polignac number, because 7988985 - 2¹ = 7988983 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7988983) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88722 + ... + 88811.

It is an arithmetic number, because the mean of its divisors is an integer number (1153971).

Almost surely, 2^7988985 is an apocalyptic number.

It is an amenable number.

7988985 is a deficient number, since it is larger than the sum of its proper divisors (5858667).

7988985 is a wasteful number, since it uses less digits than its factorization.

7988985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177544 (or 177541 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 54.

The square root of 7988985 is about 2826.4792587245. The cubic root of 7988985 is about 199.9081661725.

The spelling of 7988985 in words is "seven million, nine hundred eighty-eight thousand, nine hundred eighty-five".