16389912 has 128 divisors (see below), whose sum is σ = 52416000. Its totient is φ = 4233600.

The previous prime is 16389899. The next prime is 16389929. The reversal of 16389912 is 21998361.

16389912 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 90462 + ... + 90642.

It is an arithmetic number, because the mean of its divisors is an integer number (409500).

Almost surely, 2^16389912 is an apocalyptic number.

16389912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16389912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26208000).

16389912 is an abundant number, since it is smaller than the sum of its proper divisors (36026088).

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

16389912 is a wasteful number, since it uses less digits than its factorization.

16389912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222 (or 204 counting only the distinct ones).

The product of its digits is 23328, while the sum is 39.

The square root of 16389912 is about 4048.4456276453. The cubic root of 16389912 is about 254.0147138437.

The spelling of 16389912 in words is "sixteen million, three hundred eighty-nine thousand, nine hundred twelve".