16440045 has 16 divisors (see below), whose sum is σ = 26577600. Its totient is φ = 8676864.

The previous prime is 16440043. The next prime is 16440077. The reversal of 16440045 is 54004461.

It is not a de Polignac number, because 16440045 - 2¹ = 16440043 is a prime.

It is a super-3 number, since 3×16440045³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16439997 and 16440024.

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4195 + ... + 7104.

It is an arithmetic number, because the mean of its divisors is an integer number (1661100).

Almost surely, 2^16440045 is an apocalyptic number.

16440045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16440045 is a deficient number, since it is larger than the sum of its proper divisors (10137555).

16440045 is a wasteful number, since it uses less digits than its factorization.

16440045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11404.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 16440045 is about 4054.6325357546. The cubic root of 16440045 is about 254.2734412380.

The spelling of 16440045 in words is "sixteen million, four hundred forty thousand, forty-five".