198868520 has 32 divisors (see below), whose sum is σ = 448043400. Its totient is φ = 79442688.

The previous prime is 198868513. The next prime is 198868531. The reversal of 198868520 is 25868891.

It can be written as a sum of positive squares in 4 ways, for example, as 167081476 + 31787044 = 12926^2 + 5638^2 .

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, 32246 + ... + 37914.

Almost surely, 2^198868520 is an apocalyptic number.

198868520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198868520 is an abundant number, since it is smaller than the sum of its proper divisors (249174880).

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

198868520 is a wasteful number, since it uses less digits than its factorization.

198868520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6557 (or 6553 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 47.

The square root of 198868520 is about 14102.0750246196. The cubic root of 198868520 is about 583.6986388484.

The spelling of 198868520 in words is "one hundred ninety-eight million, eight hundred sixty-eight thousand, five hundred twenty".