198725290 has 32 divisors (see below), whose sum is σ = 378017280. Its totient is φ = 75064704.

The previous prime is 198725281. The next prime is 198725311. The reversal of 198725290 is 92527891.

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, 12702 + ... + 23638.

It is an arithmetic number, because the mean of its divisors is an integer number (11813040).

Almost surely, 2^198725290 is an apocalyptic number.

198725290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198725290 is a deficient number, since it is larger than the sum of its proper divisors (179291990).

198725290 is a wasteful number, since it uses less digits than its factorization.

198725290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11046.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 198725290 is about 14096.9957792432. The cubic root of 198725290 is about 583.5584738203.

The spelling of 198725290 in words is "one hundred ninety-eight million, seven hundred twenty-five thousand, two hundred ninety".