16405934 has 4 divisors (see below), whose sum is σ = 24608904. Its totient is φ = 8202966.

The previous prime is 16405931. The next prime is 16405951. The reversal of 16405934 is 43950461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43950461 = 773 ⋅56857.

It is a self number, because there is not a number n which added to its sum of digits gives 16405934.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16405931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4101482 + ... + 4101485.

It is an arithmetic number, because the mean of its divisors is an integer number (6152226).

Almost surely, 2^16405934 is an apocalyptic number.

16405934 is a deficient number, since it is larger than the sum of its proper divisors (8202970).

16405934 is an equidigital number, since it uses as much as digits as its factorization.

16405934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8202969.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 16405934 is about 4050.4239284302. The cubic root of 16405934 is about 254.0974577964.

The spelling of 16405934 in words is "sixteen million, four hundred five thousand, nine hundred thirty-four".