16444729 has 8 divisors (see below), whose sum is σ = 19899648. Its totient is φ = 13266240.

The previous prime is 16444699. The next prime is 16444739. The reversal of 16444729 is 92744461.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16444729 - 2⁵ = 16444697 is a prime.

It is a super-2 number, since 2×16444729² = 540858223766882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16444739) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68977 + ... + 69214.

It is an arithmetic number, because the mean of its divisors is an integer number (2487456).

Almost surely, 2^16444729 is an apocalyptic number.

It is an amenable number.

16444729 is a deficient number, since it is larger than the sum of its proper divisors (3454919).

16444729 is a wasteful number, since it uses less digits than its factorization.

16444729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138215.

The product of its digits is 48384, while the sum is 37.

The square root of 16444729 is about 4055.2101055309. The cubic root of 16444729 is about 254.2975876379.

The spelling of 16444729 in words is "sixteen million, four hundred forty-four thousand, seven hundred twenty-nine".