16440044 has 24 divisors (see below), whose sum is σ = 29893248. Its totient is φ = 7902720.

The previous prime is 16440043. The next prime is 16440077. The reversal of 16440044 is 44004461.

It is a super-3 number, since 3×16440044³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (16440041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24092 + ... + 24764.

It is an arithmetic number, because the mean of its divisors is an integer number (1245552).

Almost surely, 2^16440044 is an apocalyptic number.

It is an amenable number.

16440044 is a deficient number, since it is larger than the sum of its proper divisors (13453204).

16440044 is a wasteful number, since it uses less digits than its factorization.

16440044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905 (or 903 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 16440044 is about 4054.6324124389. The cubic root of 16440044 is about 254.2734360824.

The spelling of 16440044 in words is "sixteen million, four hundred forty thousand, forty-four".