198990139320 has 128 divisors (see below), whose sum is σ = 758057702400. Its totient is φ = 45483458688.

The previous prime is 198990139279. The next prime is 198990139339. The reversal of 198990139320 is 23931099891.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

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, 13153164 + ... + 13168283.

It is an arithmetic number, because the mean of its divisors is an integer number (5922325800).

Almost surely, 2^198990139320 is an apocalyptic number.

198990139320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198990139320 is an abundant number, since it is smaller than the sum of its proper divisors (559067563080).

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

198990139320 is a wasteful number, since it uses less digits than its factorization.

198990139320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26321474 (or 26321464 counting only the distinct ones).

The product of its (nonzero) digits is 944784, while the sum is 54.

The spelling of 198990139320 in words is "one hundred ninety-eight billion, nine hundred ninety million, one hundred thirty-nine thousand, three hundred twenty".