16089885 has 36 divisors (see below), whose sum is σ = 32446908. Its totient is φ = 7354368.

The previous prime is 16089863. The next prime is 16089889. The reversal of 16089885 is 58898061.

It can be written as a sum of positive squares in 2 ways, for example, as 5631129 + 10458756 = 2373^2 + 3234^2 .

It is not a de Polignac number, because 16089885 - 2⁹ = 16089373 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 16089885.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16089889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1444 + ... + 5853.

It is an arithmetic number, because the mean of its divisors is an integer number (901303).

Almost surely, 2^16089885 is an apocalyptic number.

16089885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16089885 is an abundant number, since it is smaller than the sum of its proper divisors (16357023).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16089885 is a wasteful number, since it uses less digits than its factorization.

16089885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7322 (or 7312 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The square root of 16089885 is about 4011.2198892606. The cubic root of 16089885 is about 252.4551957885.

The spelling of 16089885 in words is "sixteen million, eighty-nine thousand, eight hundred eighty-five".