16389144 has 24 divisors (see below), whose sum is σ = 44387460. Its totient is φ = 5463024.

The previous prime is 16389127. The next prime is 16389151. The reversal of 16389144 is 44198361.

16389144 is a `hidden beast` number, since 1 + 638 + 9 + 14 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 16389099 and 16389108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 113742 + ... + 113885.

Almost surely, 2^16389144 is an apocalyptic number.

It is an amenable number.

16389144 is an abundant number, since it is smaller than the sum of its proper divisors (27998316).

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

16389144 is a wasteful number, since it uses less digits than its factorization.

16389144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227639 (or 227632 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 16389144 is about 4048.3507753158. The cubic root of 16389144 is about 254.0107462335.

The spelling of 16389144 in words is "sixteen million, three hundred eighty-nine thousand, one hundred forty-four".