16389632 has 80 divisors (see below), whose sum is σ = 39774240. Its totient is φ = 6586368.

The previous prime is 16389613. The next prime is 16389641. The reversal of 16389632 is 23698361.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60794 + ... + 61062.

It is an arithmetic number, because the mean of its divisors is an integer number (497178).

Almost surely, 2^16389632 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 16389632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19887120).

16389632 is an abundant number, since it is smaller than the sum of its proper divisors (23384608).

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

16389632 is an equidigital number, since it uses as much as digits as its factorization.

16389632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311 (or 295 counting only the distinct ones).

The product of its digits is 46656, while the sum is 38.

The square root of 16389632 is about 4048.4110463242. The cubic root of 16389632 is about 254.0132673335.

The spelling of 16389632 in words is "sixteen million, three hundred eighty-nine thousand, six hundred thirty-two".