16389738 has 24 divisors (see below), whose sum is σ = 35626500. Its totient is φ = 5445504.

The previous prime is 16389733. The next prime is 16389739. The reversal of 16389738 is 83798361.

It is a happy number.

16389738 is a `hidden beast` number, since 1 + 638 + 9 + 7 + 3 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 16184529 + 205209 = 4023^2 + 453^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 16389693 and 16389702.

It is not an unprimeable number, because it can be changed into a prime (16389733) 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 11 ways as a sum of consecutive naturals, for example, 4978 + ... + 7586.

Almost surely, 2^16389738 is an apocalyptic number.

16389738 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

16389738 is an abundant number, since it is smaller than the sum of its proper divisors (19236762).

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

16389738 is a wasteful number, since it uses less digits than its factorization.

16389738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2966 (or 2963 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 16389738 is about 4048.4241378591. The cubic root of 16389738 is about 254.0138149429.

The spelling of 16389738 in words is "sixteen million, three hundred eighty-nine thousand, seven hundred thirty-eight".