16403894 has 8 divisors (see below), whose sum is σ = 26498640. Its totient is φ = 7571016.

The previous prime is 16403887. The next prime is 16403923. The reversal of 16403894 is 49830461.

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

It is a congruent 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, 315434 + ... + 315485.

It is an arithmetic number, because the mean of its divisors is an integer number (3312330).

Almost surely, 2^16403894 is an apocalyptic number.

16403894 is a deficient number, since it is larger than the sum of its proper divisors (10094746).

16403894 is a wasteful number, since it uses less digits than its factorization.

16403894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630934.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 16403894 is about 4050.1720951090. The cubic root of 16403894 is about 254.0869254224.

The spelling of 16403894 in words is "sixteen million, four hundred three thousand, eight hundred ninety-four".