198213736 has 64 divisors (see below), whose sum is σ = 439073280. Its totient is φ = 82114560.

The previous prime is 198213733. The next prime is 198213739. The reversal of 198213736 is 637312891.

It is an interprime number because it is at equal distance from previous prime (198213733) and next prime (198213739).

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (198213731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 561336 + ... + 561688.

It is an arithmetic number, because the mean of its divisors is an integer number (6860520).

Almost surely, 2^198213736 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 198213736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (219536640).

198213736 is an abundant number, since it is smaller than the sum of its proper divisors (240859544).

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

198213736 is a wasteful number, since it uses less digits than its factorization.

198213736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674 (or 670 counting only the distinct ones).

The product of its digits is 54432, while the sum is 40.

The square root of 198213736 is about 14078.8400090348. The cubic root of 198213736 is about 583.0573160200.

The spelling of 198213736 in words is "one hundred ninety-eight million, two hundred thirteen thousand, seven hundred thirty-six".