18397896 has 64 divisors (see below), whose sum is σ = 50561280. Its totient is φ = 5532480.

The previous prime is 18397879. The next prime is 18397903. The reversal of 18397896 is 69879381.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59775 + ... + 60081.

It is an arithmetic number, because the mean of its divisors is an integer number (790020).

Almost surely, 2^18397896 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 18397896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25280640).

18397896 is an abundant number, since it is smaller than the sum of its proper divisors (32163384).

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

18397896 is a wasteful number, since it uses less digits than its factorization.

18397896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554 (or 550 counting only the distinct ones).

The product of its digits is 653184, while the sum is 51.

The square root of 18397896 is about 4289.2768621296. The cubic root of 18397896 is about 263.9911613202.

The spelling of 18397896 in words is "eighteen million, three hundred ninety-seven thousand, eight hundred ninety-six".