16404742 has 4 divisors (see below), whose sum is σ = 24607116. Its totient is φ = 8202370.

The previous prime is 16404709. The next prime is 16404757. The reversal of 16404742 is 24740461.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 16404742.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4101184 + ... + 4101187.

It is an arithmetic number, because the mean of its divisors is an integer number (6151779).

Almost surely, 2^16404742 is an apocalyptic number.

16404742 is a deficient number, since it is larger than the sum of its proper divisors (8202374).

16404742 is an equidigital number, since it uses as much as digits as its factorization.

16404742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8202373.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 16404742 is about 4050.2767806657. The cubic root of 16404742 is about 254.0913036917.

The spelling of 16404742 in words is "sixteen million, four hundred four thousand, seven hundred forty-two".