16389044 has 24 divisors (see below), whose sum is σ = 32910528. Its totient is φ = 6995520.

The previous prime is 16389019. The next prime is 16389047. The reversal of 16389044 is 44098361.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 16388995 and 16389013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16389047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6827 + ... + 8909.

It is an arithmetic number, because the mean of its divisors is an integer number (1371272).

Almost surely, 2^16389044 is an apocalyptic number.

16389044 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

16389044 is an abundant number, since it is smaller than the sum of its proper divisors (16521484).

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

16389044 is a wasteful number, since it uses less digits than its factorization.

16389044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2375 (or 2373 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 16389044 is about 4048.3384245885. The cubic root of 16389044 is about 254.0102296085.

The spelling of 16389044 in words is "sixteen million, three hundred eighty-nine thousand, forty-four".