998979900 has 36 divisors (see below), whose sum is σ = 2890382712. Its totient is φ = 266394560.

The previous prime is 998979899. The next prime is 998979901. The reversal of 998979900 is 9979899.

It is an interprime number because it is at equal distance from previous prime (998979899) and next prime (998979901).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998979901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1664667 + ... + 1665266.

Almost surely, 2^998979900 is an apocalyptic number.

It is an amenable number.

998979900 is an abundant number, since it is smaller than the sum of its proper divisors (1891402812).

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

998979900 is a wasteful number, since it uses less digits than its factorization.

998979900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3329950 (or 3329943 counting only the distinct ones).

The product of its (nonzero) digits is 3306744, while the sum is 60.

The square root of 998979900 is about 31606.6432890302. The cubic root of 998979900 is about 999.6598509784.

The spelling of 998979900 in words is "nine hundred ninety-eight million, nine hundred seventy-nine thousand, nine hundred".