198695808 has 64 divisors (see below), whose sum is σ = 586438800. Its totient is φ = 66230784.

The previous prime is 198695797. The next prime is 198695839. The reversal of 198695808 is 808596891.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25291 + ... + 32202.

Almost surely, 2^198695808 is an apocalyptic number.

198695808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

198695808 is an abundant number, since it is smaller than the sum of its proper divisors (387742992).

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

198695808 is an equidigital number, since it uses as much as digits as its factorization.

198695808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57516 (or 57498 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 54.

The square root of 198695808 is about 14095.9500566652. The cubic root of 198695808 is about 583.5296143467.

The spelling of 198695808 in words is "one hundred ninety-eight million, six hundred ninety-five thousand, eight hundred eight".