16404441 has 4 divisors (see below), whose sum is σ = 21872592. Its totient is φ = 10936292.

The previous prime is 16404413. The next prime is 16404449. The reversal of 16404441 is 14440461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16404441 - 2¹⁰ = 16403417 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16404449) 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, 2734071 + ... + 2734076.

It is an arithmetic number, because the mean of its divisors is an integer number (5468148).

Almost surely, 2^16404441 is an apocalyptic number.

It is an amenable number.

16404441 is a deficient number, since it is larger than the sum of its proper divisors (5468151).

16404441 is an equidigital number, since it uses as much as digits as its factorization.

16404441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5468150.

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 16404441 is about 4050.2396225409. The cubic root of 16404441 is about 254.0897496299.

The spelling of 16404441 in words is "sixteen million, four hundred four thousand, four hundred forty-one".