16404434 has 8 divisors (see below), whose sum is σ = 24625920. Its totient is φ = 8195796.

The previous prime is 16404413. The next prime is 16404449. The reversal of 16404434 is 43440461.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1187 + ... + 5849.

It is an arithmetic number, because the mean of its divisors is an integer number (3078240).

Almost surely, 2^16404434 is an apocalyptic number.

16404434 is a deficient number, since it is larger than the sum of its proper divisors (8221486).

16404434 is a wasteful number, since it uses less digits than its factorization.

16404434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6424.

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 16404434 is about 4050.2387583944. The cubic root of 16404434 is about 254.0897134887.

Adding to 16404434 its reverse (43440461), we get a palindrome (59844895).

The spelling of 16404434 in words is "sixteen million, four hundred four thousand, four hundred thirty-four".