16440042 has 16 divisors (see below), whose sum is σ = 34014240. Its totient is φ = 5290992.

The previous prime is 16440041. The next prime is 16440043. The reversal of 16440042 is 24004461.

It is an interprime number because it is at equal distance from previous prime (16440041) and next prime (16440043).

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, 47068 + ... + 47415.

It is an arithmetic number, because the mean of its divisors is an integer number (2125890).

Almost surely, 2^16440042 is an apocalyptic number.

16440042 is an abundant number, since it is smaller than the sum of its proper divisors (17574198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16440042 is a wasteful number, since it uses less digits than its factorization.

16440042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94517.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 16440042 is about 4054.6321658074. The cubic root of 16440042 is about 254.2734257713.

The spelling of 16440042 in words is "sixteen million, four hundred forty thousand, forty-two".