440404031 has 4 divisors (see below), whose sum is σ = 440564064. Its totient is φ = 440244000.

The previous prime is 440403991. The next prime is 440404039. The reversal of 440404031 is 130404044.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-440404031 is a prime.

It is a super-2 number, since 2×440404031² = 387911421042097922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 440403994 and 440404012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440404039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75815 + ... + 81416.

It is an arithmetic number, because the mean of its divisors is an integer number (110141016).

Almost surely, 2^440404031 is an apocalyptic number.

440404031 is a deficient number, since it is larger than the sum of its proper divisors (160033).

440404031 is a wasteful number, since it uses less digits than its factorization.

440404031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160032.

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

The square root of 440404031 is about 20985.8054646468. The cubic root of 440404031 is about 760.8232255802.

Adding to 440404031 its reverse (130404044), we get a palindrome (570808075).

The spelling of 440404031 in words is "four hundred forty million, four hundred four thousand, thirty-one".