16404029 has 4 divisors (see below), whose sum is σ = 16453920. Its totient is φ = 16354140.

The previous prime is 16404007. The next prime is 16404041. The reversal of 16404029 is 92040461.

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 16404029 - 2²⁰ = 15355453 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 16403989 and 16404007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16404229) 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, 24449 + ... + 25110.

It is an arithmetic number, because the mean of its divisors is an integer number (4113480).

Almost surely, 2^16404029 is an apocalyptic number.

It is an amenable number.

16404029 is a deficient number, since it is larger than the sum of its proper divisors (49891).

16404029 is an equidigital number, since it uses as much as digits as its factorization.

16404029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49890.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 16404029 is about 4050.1887610332. The cubic root of 16404029 is about 254.0876224447.

The spelling of 16404029 in words is "sixteen million, four hundred four thousand, twenty-nine".