198979932 has 96 divisors (see below), whose sum is σ = 509017600. Its totient is φ = 60279552.

The previous prime is 198979909. The next prime is 198979939. The reversal of 198979932 is 239979891.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198979939) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 868794 + ... + 869022.

Almost surely, 2^198979932 is an apocalyptic number.

198979932 is a gapful number since it is divisible by the number (12) 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 198979932, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254508800).

198979932 is an abundant number, since it is smaller than the sum of its proper divisors (310037668).

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

198979932 is a wasteful number, since it uses less digits than its factorization.

198979932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395 (or 393 counting only the distinct ones).

The product of its digits is 2204496, while the sum is 57.

The square root of 198979932 is about 14106.0246703315. The cubic root of 198979932 is about 583.8076202204.

The spelling of 198979932 in words is "one hundred ninety-eight million, nine hundred seventy-nine thousand, nine hundred thirty-two".