16428723 has 8 divisors (see below), whose sum is σ = 22205328. Its totient is φ = 10802304.

The previous prime is 16428719. The next prime is 16428743. The reversal of 16428723 is 32782461.

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

It is not a de Polignac number, because 16428723 - 2² = 16428719 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (16428743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37290 + ... + 37727.

It is an arithmetic number, because the mean of its divisors is an integer number (2775666).

Almost surely, 2^16428723 is an apocalyptic number.

16428723 is a deficient number, since it is larger than the sum of its proper divisors (5776605).

16428723 is an equidigital number, since it uses as much as digits as its factorization.

16428723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75093.

The product of its digits is 16128, while the sum is 33.

The square root of 16428723 is about 4053.2361145139. The cubic root of 16428723 is about 254.2150564620.

The spelling of 16428723 in words is "sixteen million, four hundred twenty-eight thousand, seven hundred twenty-three".