998090 has 8 divisors (see below), whose sum is σ = 1796580. Its totient is φ = 399232.

The previous prime is 998083. The next prime is 998111. The reversal of 998090 is 90899.

It can be written as a sum of positive squares in 2 ways, for example, as 935089 + 63001 = 967^2 + 251^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 998090.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 998090.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49895 + ... + 49914.

2⁹⁹⁸⁰⁹⁰ is an apocalyptic number.

998090 is a deficient number, since it is larger than the sum of its proper divisors (798490).

998090 is a wasteful number, since it uses less digits than its factorization.

998090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99816.

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 998090 is about 999.0445435515. The cubic root of 998090 is about 99.9362927558.

The spelling of 998090 in words is "nine hundred ninety-eight thousand, ninety".