989595988 has 6 divisors (see below), whose sum is σ = 1731792986. Its totient is φ = 494797992.

The previous prime is 989595979. The next prime is 989595989. The reversal of 989595988 is 889595989.

It is a happy number.

989595988 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 546998544 + 442597444 = 23388^2 + 21038^2 .

It is a super-2 number, since 2×989595988² = 1958600438931392288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989595989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123699495 + ... + 123699502.

Almost surely, 2^989595988 is an apocalyptic number.

It is an amenable number.

989595988 is a deficient number, since it is larger than the sum of its proper divisors (742196998).

989595988 is a wasteful number, since it uses less digits than its factorization.

989595988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247399001 (or 247398999 counting only the distinct ones).

The product of its digits is 83980800, while the sum is 70.

The square root of 989595988 is about 31457.8446178374. The cubic root of 989595988 is about 996.5198989459.

Subtracting from 989595988 its reverse (889595989), we obtain a palindrome (99999999).

The spelling of 989595988 in words is "nine hundred eighty-nine million, five hundred ninety-five thousand, nine hundred eighty-eight".