16440836 has 24 divisors (see below), whose sum is σ = 31212216. Its totient is φ = 7546880.

The previous prime is 16440829. The next prime is 16440847. The reversal of 16440836 is 63804461.

It can be written as a sum of positive squares in 4 ways, for example, as 3880900 + 12559936 = 1970^2 + 3544^2 .

It is a super-3 number, since 3×16440836³ (a number of 23 digits) contains 333 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 161 + ... + 5736.

It is an arithmetic number, because the mean of its divisors is an integer number (1300509).

Almost surely, 2^16440836 is an apocalyptic number.

It is an amenable number.

16440836 is a deficient number, since it is larger than the sum of its proper divisors (14771380).

16440836 is a wasteful number, since it uses less digits than its factorization.

16440836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5959 (or 5957 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 16440836 is about 4054.7300773294. The cubic root of 16440836 is about 254.2775192290.

The spelling of 16440836 in words is "sixteen million, four hundred forty thousand, eight hundred thirty-six".