16449439 has 4 divisors (see below), whose sum is σ = 17164656. Its totient is φ = 15734224.

The previous prime is 16449427. The next prime is 16449449. The reversal of 16449439 is 93494461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16449439 - 2⁷ = 16449311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16449449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 357574 + ... + 357619.

It is an arithmetic number, because the mean of its divisors is an integer number (4291164).

Almost surely, 2^16449439 is an apocalyptic number.

16449439 is a deficient number, since it is larger than the sum of its proper divisors (715217).

16449439 is an equidigital number, since it uses as much as digits as its factorization.

16449439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715216.

The product of its digits is 93312, while the sum is 40.

The square root of 16449439 is about 4055.7907983524. The cubic root of 16449439 is about 254.3218634470.

The spelling of 16449439 in words is "sixteen million, four hundred forty-nine thousand, four hundred thirty-nine".