40440143 has 4 divisors (see below), whose sum is σ = 40453608. Its totient is φ = 40426680.

The previous prime is 40440131. The next prime is 40440157. The reversal of 40440143 is 34104404.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 40440143 - 2⁶ = 40440079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40460143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53 + ... + 8993.

It is an arithmetic number, because the mean of its divisors is an integer number (10113402).

Almost surely, 2^40440143 is an apocalyptic number.

40440143 is a deficient number, since it is larger than the sum of its proper divisors (13465).

40440143 is an equidigital number, since it uses as much as digits as its factorization.

40440143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13464.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 40440143 is about 6359.2564816966. The cubic root of 40440143 is about 343.2450062373.

Adding to 40440143 its reverse (34104404), we get a palindrome (74544547).

The spelling of 40440143 in words is "forty million, four hundred forty thousand, one hundred forty-three".