16172885 has 8 divisors (see below), whose sum is σ = 19932216. Its totient is φ = 12588480.

The previous prime is 16172873. The next prime is 16172911. The reversal of 16172885 is 58827161.

It can be written as a sum of positive squares in 4 ways, for example, as 6482116 + 9690769 = 2546^2 + 3113^2 .

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

It is not a de Polignac number, because 16172885 - 2¹⁰ = 16171861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43526 + ... + 43895.

It is an arithmetic number, because the mean of its divisors is an integer number (2491527).

Almost surely, 2^16172885 is an apocalyptic number.

It is an amenable number.

16172885 is a deficient number, since it is larger than the sum of its proper divisors (3759331).

16172885 is an equidigital number, since it uses as much as digits as its factorization.

16172885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87463.

The product of its digits is 26880, while the sum is 38.

The square root of 16172885 is about 4021.5525608899. The cubic root of 16172885 is about 252.8885499110. Note that the first 3 decimals are identical.

The spelling of 16172885 in words is "sixteen million, one hundred seventy-two thousand, eight hundred eighty-five".