16398187 has 8 divisors (see below), whose sum is σ = 17796240. Its totient is φ = 15019680.

The previous prime is 16398181. The next prime is 16398191. The reversal of 16398187 is 78189361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16398187 - 2²³ = 8009579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16398181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3112 + ... + 6517.

It is an arithmetic number, because the mean of its divisors is an integer number (2224530).

Almost surely, 2^16398187 is an apocalyptic number.

16398187 is a deficient number, since it is larger than the sum of its proper divisors (1398053).

16398187 is a wasteful number, since it uses less digits than its factorization.

16398187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9773.

The product of its digits is 72576, while the sum is 43.

The square root of 16398187 is about 4049.4674958567. The cubic root of 16398187 is about 254.0574559505.

The spelling of 16398187 in words is "sixteen million, three hundred ninety-eight thousand, one hundred eighty-seven".