198392857320 has 128 divisors (see below), whose sum is σ = 680766508800. Its totient is φ = 45309444096.

The previous prime is 198392857307. The next prime is 198392857337. The reversal of 198392857320 is 23758293891.

It is a happy number.

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 925246 + ... + 1119314.

It is an arithmetic number, because the mean of its divisors is an integer number (5318488350).

Almost surely, 2^198392857320 is an apocalyptic number.

198392857320 is a gapful number since it is divisible by the number (10) 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 198392857320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (340383254400).

198392857320 is an abundant number, since it is smaller than the sum of its proper divisors (482373651480).

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

198392857320 is a wasteful number, since it uses less digits than its factorization.

198392857320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195307 (or 195303 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 57.

The spelling of 198392857320 in words is "one hundred ninety-eight billion, three hundred ninety-two million, eight hundred fifty-seven thousand, three hundred twenty".