989898788 has 6 divisors (see below), whose sum is σ = 1732322886. Its totient is φ = 494949392.

The previous prime is 989898781. The next prime is 989898809. The reversal of 989898788 is 887898989.

It can be written as a sum of positive squares in only one way, i.e., 972940864 + 16957924 = 31192^2 + 4118^2 .

It is a super-2 number, since 2×989898788² = 1959799220967737888, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (989898781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123737345 + ... + 123737352.

It is an arithmetic number, because the mean of its divisors is an integer number (288720481).

Almost surely, 2^989898788 is an apocalyptic number.

It is an amenable number.

989898788 is a deficient number, since it is larger than the sum of its proper divisors (742424098).

989898788 is a wasteful number, since it uses less digits than its factorization.

989898788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247474701 (or 247474699 counting only the distinct ones).

The product of its digits is 167215104, while the sum is 74.

The square root of 989898788 is about 31462.6570397352. The cubic root of 989898788 is about 996.6215281151.

The spelling of 989898788 in words is "nine hundred eighty-nine million, eight hundred ninety-eight thousand, seven hundred eighty-eight".