998909900 has 36 divisors (see below), whose sum is σ = 2237565120. Its totient is φ = 386673600.

The previous prime is 998909887. The next prime is 998909903. The reversal of 998909900 is 9909899.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (998909903) 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, 158015 + ... + 164214.

Almost surely, 2^998909900 is an apocalyptic number.

It is an amenable number.

998909900 is an abundant number, since it is smaller than the sum of its proper divisors (1238655220).

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

998909900 is a wasteful number, since it uses less digits than its factorization.

998909900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322274 (or 322267 counting only the distinct ones).

The product of its (nonzero) digits is 472392, while the sum is 53.

The square root of 998909900 is about 31605.5359074957. The cubic root of 998909900 is about 999.6365012180.

The spelling of 998909900 in words is "nine hundred ninety-eight million, nine hundred nine thousand, nine hundred".