16440743 has 4 divisors (see below), whose sum is σ = 17935368. Its totient is φ = 14946120.

The previous prime is 16440731. The next prime is 16440761. The reversal of 16440743 is 34704461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16440743 - 2⁴ = 16440727 is a prime.

It is a super-3 number, since 3×16440743³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16440043) 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 3 ways as a sum of consecutive naturals, for example, 747296 + ... + 747317.

It is an arithmetic number, because the mean of its divisors is an integer number (4483842).

Almost surely, 2^16440743 is an apocalyptic number.

16440743 is a deficient number, since it is larger than the sum of its proper divisors (1494625).

16440743 is a wasteful number, since it uses less digits than its factorization.

16440743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1494624.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 16440743 is about 4054.7186092256. The cubic root of 16440743 is about 254.2770397754.

The spelling of 16440743 in words is "sixteen million, four hundred forty thousand, seven hundred forty-three".