16039944 has 96 divisors (see below), whose sum is σ = 46475520. Its totient is φ = 5178816.

The previous prime is 16039921. The next prime is 16039957. The reversal of 16039944 is 44993061.

16039944 is a `hidden beast` number, since 1 + 603 + 9 + 9 + 44 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 16039899 and 16039908.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71817 + ... + 72039.

It is an arithmetic number, because the mean of its divisors is an integer number (484120).

It is a vampire number, since it can be written as 3996 ⋅ 4014 (with its own digits).

Almost surely, 2^16039944 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 16039944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23237760).

16039944 is an abundant number, since it is smaller than the sum of its proper divisors (30435576).

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

16039944 is a wasteful number, since it uses less digits than its factorization.

16039944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281 (or 265 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 16039944 is about 4004.9898876277. The cubic root of 16039944 is about 252.1937285813.

It can be divided in two parts, 160 and 39944, that added together give a palindrome (40104).

The spelling of 16039944 in words is "sixteen million, thirty-nine thousand, nine hundred forty-four".