12197898 has 32 divisors (see below), whose sum is σ = 27360000. Its totient is φ = 4027968.

The previous prime is 12197879. The next prime is 12197903. The reversal of 12197898 is 89879121.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5103 + ... + 7101.

It is an arithmetic number, because the mean of its divisors is an integer number (855000).

Almost surely, 2^12197898 is an apocalyptic number.

12197898 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12197898, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13680000).

12197898 is an abundant number, since it is smaller than the sum of its proper divisors (15162102).

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

12197898 is a wasteful number, since it uses less digits than its factorization.

12197898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2123 (or 2117 counting only the distinct ones).

The product of its digits is 72576, while the sum is 45.

The square root of 12197898 is about 3492.5489259279. The cubic root of 12197898 is about 230.1945298158.

The spelling of 12197898 in words is "twelve million, one hundred ninety-seven thousand, eight hundred ninety-eight".