40442443 has 8 divisors (see below), whose sum is σ = 42968880. Its totient is φ = 37991520.

The previous prime is 40442429. The next prime is 40442447. The reversal of 40442443 is 34424404.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40442443 - 2⁵ = 40442411 is a prime.

It is a super-3 number, since 3×40442443³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40442447) 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, 17773 + ... + 19918.

It is an arithmetic number, because the mean of its divisors is an integer number (5371110).

Almost surely, 2^40442443 is an apocalyptic number.

40442443 is a deficient number, since it is larger than the sum of its proper divisors (2526437).

40442443 is a wasteful number, since it uses less digits than its factorization.

40442443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37757.

The product of its (nonzero) digits is 6144, while the sum is 25.

The square root of 40442443 is about 6359.4373178765. The cubic root of 40442443 is about 343.2515133734.

Adding to 40442443 its reverse (34424404), we get a palindrome (74866847).

The spelling of 40442443 in words is "forty million, four hundred forty-two thousand, four hundred forty-three".