198487920 has 80 divisors (see below), whose sum is σ = 651520800. Its totient is φ = 49815552.

The previous prime is 198487897. The next prime is 198487931. The reversal of 198487920 is 29784891.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 198487920.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20245 + ... + 28404.

It is an arithmetic number, because the mean of its divisors is an integer number (8144010).

Almost surely, 2^198487920 is an apocalyptic number.

198487920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198487920 is an abundant number, since it is smaller than the sum of its proper divisors (453032880).

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

198487920 is a wasteful number, since it uses less digits than its factorization.

198487920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48682 (or 48676 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 48.

The square root of 198487920 is about 14088.5740939245. The cubic root of 198487920 is about 583.3260349200.

The spelling of 198487920 in words is "one hundred ninety-eight million, four hundred eighty-seven thousand, nine hundred twenty".