198396924 has 72 divisors (see below), whose sum is σ = 513018240. Its totient is φ = 59627040.

The previous prime is 198396901. The next prime is 198396929. The reversal of 198396924 is 429693891.

It is a super-2 number, since 2×198396924² = 78722678905323552, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198396929) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 201337 + ... + 202319.

Almost surely, 2^198396924 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198396924, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (256509120).

198396924 is an abundant number, since it is smaller than the sum of its proper divisors (314621316).

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

198396924 is a wasteful number, since it uses less digits than its factorization.

198396924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1151 (or 1138 counting only the distinct ones).

The product of its digits is 839808, while the sum is 51.

The square root of 198396924 is about 14085.3442982413. The cubic root of 198396924 is about 583.2368801251.

The spelling of 198396924 in words is "one hundred ninety-eight million, three hundred ninety-six thousand, nine hundred twenty-four".