16449885 has 28 divisors (see below), whose sum is σ = 29602812. Its totient is φ = 8771328.

The previous prime is 16449883. The next prime is 16449949. The reversal of 16449885 is 58894461.

It can be written as a sum of positive squares in 2 ways, for example, as 1750329 + 14699556 = 1323^2 + 3834^2 .

It is not a de Polignac number, because 16449885 - 2¹ = 16449883 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 16449885.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16449883) 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 27 ways as a sum of consecutive naturals, for example, 1389 + ... + 5901.

Almost surely, 2^16449885 is an apocalyptic number.

16449885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16449885 is a deficient number, since it is larger than the sum of its proper divisors (13152927).

16449885 is an frugal number, since it uses more digits than its factorization.

16449885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4536 (or 4521 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 16449885 is about 4055.8457810918. The cubic root of 16449885 is about 254.3241619353.

The spelling of 16449885 in words is "sixteen million, four hundred forty-nine thousand, eight hundred eighty-five".