198215424 has 270 divisors, whose sum is σ = 657881840. Its totient is φ = 59304960.

The previous prime is 198215419. The next prime is 198215441. The reversal of 198215424 is 424512891.

198215424 is a `hidden beast` number, since 1 + 98 + 21 + 542 + 4 = 666.

It is a super-2 number, since 2×198215424² = 78578708622999552, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 2509017 + ... + 2509095.

Almost surely, 2^198215424 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 198215424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (328940920).

198215424 is an abundant number, since it is smaller than the sum of its proper divisors (459666416).

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

198215424 is an equidigital number, since it uses as much as digits as its factorization.

198215424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129 (or 95 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 198215424 is about 14078.8999570279. The cubic root of 198215424 is about 583.0589711322.

The spelling of 198215424 in words is "one hundred ninety-eight million, two hundred fifteen thousand, four hundred twenty-four".