9898990 has 16 divisors (see below), whose sum is σ = 17930448. Its totient is φ = 3934656.

The previous prime is 9898979. The next prime is 9899003. The reversal of 9898990 is 998989.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1407 + ... + 4666.

It is an arithmetic number, because the mean of its divisors is an integer number (1120653).

Almost surely, 2^9898990 is an apocalyptic number.

9898990 is a deficient number, since it is larger than the sum of its proper divisors (8031458).

9898990 is a wasteful number, since it uses less digits than its factorization.

9898990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6243.

The product of its (nonzero) digits is 419904, while the sum is 52.

The square root of 9898990 is about 3146.2660408808. The cubic root of 9898990 is about 214.7156146284.

The spelling of 9898990 in words is "nine million, eight hundred ninety-eight thousand, nine hundred ninety".