9990337898 has 16 divisors (see below), whose sum is σ = 15357754440. Its totient is φ = 4871193600.

The previous prime is 9990337849. The next prime is 9990337909. The reversal of 9990337898 is 8987330999.

It can be written as a sum of positive squares in 4 ways, for example, as 660130249 + 9330207649 = 25693^2 + 96593^2 .

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, 169658 + ... + 220826.

Almost surely, 2^9990337898 is an apocalyptic number.

9990337898 is a deficient number, since it is larger than the sum of its proper divisors (5367416542).

9990337898 is a wasteful number, since it uses less digits than its factorization.

9990337898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53593.

The product of its (nonzero) digits is 26453952, while the sum is 65.

The square root of 9990337898 is about 99951.6778148321. The cubic root of 9990337898 is about 2153.7405875100.

The spelling of 9990337898 in words is "nine billion, nine hundred ninety million, three hundred thirty-seven thousand, eight hundred ninety-eight".