198632690 has 16 divisors (see below), whose sum is σ = 358281792. Its totient is φ = 79287984.

The previous prime is 198632677. The next prime is 198632701. The reversal of 198632690 is 96236891.

It is a super-2 number, since 2×198632690² = 78909891073272200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15524 + ... + 25263.

It is an arithmetic number, because the mean of its divisors is an integer number (22392612).

Almost surely, 2^198632690 is an apocalyptic number.

198632690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198632690 is a deficient number, since it is larger than the sum of its proper divisors (159649102).

198632690 is a wasteful number, since it uses less digits than its factorization.

198632690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41281.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 198632690 is about 14093.7110088152. The cubic root of 198632690 is about 583.4678195137.

The spelling of 198632690 in words is "one hundred ninety-eight million, six hundred thirty-two thousand, six hundred ninety".