198180407928 has 64 divisors (see below), whose sum is σ = 517759925760. Its totient is φ = 63150990336.

The previous prime is 198180407903. The next prime is 198180407939. The reversal of 198180407928 is 829704081891.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1994425 + ... + 2091432.

It is an arithmetic number, because the mean of its divisors is an integer number (8089998840).

Almost surely, 2^198180407928 is an apocalyptic number.

It is an amenable number.

198180407928 is an abundant number, since it is smaller than the sum of its proper divisors (319579517832).

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

198180407928 is a wasteful number, since it uses less digits than its factorization.

198180407928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4085956 (or 4085952 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 57.

The spelling of 198180407928 in words is "one hundred ninety-eight billion, one hundred eighty million, four hundred seven thousand, nine hundred twenty-eight".