998598090 has 32 divisors (see below), whose sum is σ = 2739012480. Its totient is φ = 228250944.

The previous prime is 998598089. The next prime is 998598131. The reversal of 998598090 is 90895899.

It is a self number, because there is not a number n which added to its sum of digits gives 998598090.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2377405 + ... + 2377824.

It is an arithmetic number, because the mean of its divisors is an integer number (85594140).

Almost surely, 2^998598090 is an apocalyptic number.

998598090 is an abundant number, since it is smaller than the sum of its proper divisors (1740414390).

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

998598090 is a wasteful number, since it uses less digits than its factorization.

998598090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4755246.

The product of its (nonzero) digits is 2099520, while the sum is 57.

The square root of 998598090 is about 31600.6026841261. The cubic root of 998598090 is about 999.5324781240.

The spelling of 998598090 in words is "nine hundred ninety-eight million, five hundred ninety-eight thousand, ninety".