16400589 has 8 divisors (see below), whose sum is σ = 21889632. Its totient is φ = 10922640.

The previous prime is 16400567. The next prime is 16400609. The reversal of 16400589 is 98500461.

16400589 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-16400589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16400539) 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, 1719 + ... + 5979.

It is an arithmetic number, because the mean of its divisors is an integer number (2736204).

Almost surely, 2^16400589 is an apocalyptic number.

It is an amenable number.

16400589 is a deficient number, since it is larger than the sum of its proper divisors (5489043).

16400589 is a wasteful number, since it uses less digits than its factorization.

16400589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5547.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 16400589 is about 4049.7640672019. The cubic root of 16400589 is about 254.0698600904.

The spelling of 16400589 in words is "sixteen million, four hundred thousand, five hundred eighty-nine".