198572868 has 72 divisors (see below), whose sum is σ = 546041496. Its totient is φ = 60480000.

The previous prime is 198572867. The next prime is 198572897. The reversal of 198572868 is 868275891.

198572868 is a `hidden beast` number, since 1 + 9 + 8 + 572 + 8 + 68 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 9290304 + 189282564 = 3048^2 + 13758^2 .

Its product of digits (1935360) is a multiple of the sum of its prime divisors (4320).

It is not an unprimeable number, because it can be changed into a prime (198572863) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 45168 + ... + 49368.

Almost surely, 2^198572868 is an apocalyptic number.

198572868 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198572868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (273020748).

198572868 is an abundant number, since it is smaller than the sum of its proper divisors (347468628).

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

198572868 is a wasteful number, since it uses less digits than its factorization.

198572868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4325 (or 4320 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 54.

The square root of 198572868 is about 14091.5885548791. The cubic root of 198572868 is about 583.4092395010.

The spelling of 198572868 in words is "one hundred ninety-eight million, five hundred seventy-two thousand, eight hundred sixty-eight".