16404605 has 8 divisors (see below), whose sum is σ = 22497792. Its totient is φ = 11248848.

The previous prime is 16404599. The next prime is 16404623. The reversal of 16404605 is 50640461.

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 16404605 - 2¹⁰ = 16403581 is a prime.

It is a super-2 number, since 2×16404605² = 538222130412050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234317 + ... + 234386.

It is an arithmetic number, because the mean of its divisors is an integer number (2812224).

Almost surely, 2^16404605 is an apocalyptic number.

It is an amenable number.

16404605 is a deficient number, since it is larger than the sum of its proper divisors (6093187).

16404605 is an equidigital number, since it uses as much as digits as its factorization.

16404605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468715.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 16404605 is about 4050.2598682060. The cubic root of 16404605 is about 254.0905963636.

The spelling of 16404605 in words is "sixteen million, four hundred four thousand, six hundred five".