440042031 has 72 divisors (see below), whose sum is σ = 776900880. Its totient is φ = 245868480.

The previous prime is 440042023. The next prime is 440042051. The reversal of 440042031 is 130240044.

It is not a de Polignac number, because 440042031 - 2³ = 440042023 is a prime.

It is a super-2 number, since 2×440042031² = 387273978093209922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 440041995 and 440042013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440042011) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 551725 + ... + 552521.

It is an arithmetic number, because the mean of its divisors is an integer number (10790290).

Almost surely, 2^440042031 is an apocalyptic number.

440042031 is a deficient number, since it is larger than the sum of its proper divisors (336858849).

440042031 is a wasteful number, since it uses less digits than its factorization.

440042031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854 (or 824 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 440042031 is about 20977.1788141304. The cubic root of 440042031 is about 760.6147098501.

Adding to 440042031 its reverse (130240044), we get a palindrome (570282075).

The spelling of 440042031 in words is "four hundred forty million, forty-two thousand, thirty-one".