198457992 has 32 divisors (see below), whose sum is σ = 551272800. Its totient is φ = 66152592.

The previous prime is 198457969. The next prime is 198458003. The reversal of 198457992 is 299754891.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 459178 + ... + 459609.

It is an arithmetic number, because the mean of its divisors is an integer number (17227275).

Almost surely, 2^198457992 is an apocalyptic number.

198457992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

198457992 is an abundant number, since it is smaller than the sum of its proper divisors (352814808).

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

198457992 is a wasteful number, since it uses less digits than its factorization.

198457992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918802 (or 918792 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 54.

The square root of 198457992 is about 14087.5119165877. The cubic root of 198457992 is about 583.2967154883.

The spelling of 198457992 in words is "one hundred ninety-eight million, four hundred fifty-seven thousand, nine hundred ninety-two".