440031 has 4 divisors (see below), whose sum is σ = 586712. Its totient is φ = 293352.

The previous prime is 440023. The next prime is 440039. The reversal of 440031 is 130044.

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

It is an interprime number because it is at equal distance from previous prime (440023) and next prime (440039).

It is not a de Polignac number, because 440031 - 2³ = 440023 is a prime.

It is a super-2 number, since 2×440031² = 387254561922, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 439989 and 440016.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 440031.

It is not an unprimeable number, because it can be changed into a prime (440039) 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, 73336 + ... + 73341.

It is an arithmetic number, because the mean of its divisors is an integer number (146678).

2⁴⁴⁰⁰³¹ is an apocalyptic number.

440031 is a deficient number, since it is larger than the sum of its proper divisors (146681).

440031 is a wasteful number, since it uses less digits than its factorization.

440031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146680.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 440031 is about 663.3483247887. The cubic root of 440031 is about 76.0608354085.

Adding to 440031 its reverse (130044), we get a palindrome (570075).

The spelling of 440031 in words is "four hundred forty thousand, thirty-one".