198499490 has 96 divisors (see below), whose sum is σ = 438922800. Its totient is φ = 64350720.

The previous prime is 198499489. The next prime is 198499523. The reversal of 198499490 is 94994891.

It can be written as a sum of positive squares in 8 ways, for example, as 79405921 + 119093569 = 8911^2 + 10913^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 866696 + ... + 866924.

Almost surely, 2^198499490 is an apocalyptic number.

198499490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198499490 is an abundant number, since it is smaller than the sum of its proper divisors (240423310).

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

198499490 is a wasteful number, since it uses less digits than its factorization.

198499490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340 (or 333 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 53.

The square root of 198499490 is about 14088.9847043710. The cubic root of 198499490 is about 583.3373688610.

The spelling of 198499490 in words is "one hundred ninety-eight million, four hundred ninety-nine thousand, four hundred ninety".