198723870936 has 128 divisors (see below), whose sum is σ = 563203238400. Its totient is φ = 64906496640.

The previous prime is 198723870931. The next prime is 198723870971. The reversal of 198723870936 is 639078327891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198723870931) 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, 3436615 + ... + 3493961.

It is an arithmetic number, because the mean of its divisors is an integer number (4400025300).

Almost surely, 2^198723870936 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 198723870936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (281601619200).

198723870936 is an abundant number, since it is smaller than the sum of its proper divisors (364479367464).

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

198723870936 is a wasteful number, since it uses less digits than its factorization.

198723870936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57686 (or 57676 counting only the distinct ones).

The product of its (nonzero) digits is 27433728, while the sum is 63.

The spelling of 198723870936 in words is "one hundred ninety-eight billion, seven hundred twenty-three million, eight hundred seventy thousand, nine hundred thirty-six".