16428999 has 16 divisors (see below), whose sum is σ = 22620032. Its totient is φ = 10598688.

The previous prime is 16428989. The next prime is 16429001. The reversal of 16428999 is 99982461.

It is not a de Polignac number, because 16428999 - 2⁴ = 16428983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16428989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31152 + ... + 31674.

It is an arithmetic number, because the mean of its divisors is an integer number (1413752).

Almost surely, 2^16428999 is an apocalyptic number.

16428999 is a deficient number, since it is larger than the sum of its proper divisors (6191033).

16428999 is a wasteful number, since it uses less digits than its factorization.

16428999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 846.

The product of its digits is 279936, while the sum is 48.

The square root of 16428999 is about 4053.2701612402. The cubic root of 16428999 is about 254.2164800452.

The spelling of 16428999 in words is "sixteen million, four hundred twenty-eight thousand, nine hundred ninety-nine".