440540431 has 8 divisors (see below), whose sum is σ = 466742304. Its totient is φ = 414370560.

The previous prime is 440540423. The next prime is 440540437. The reversal of 440540431 is 134045044.

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 440540431 - 2³ = 440540423 is a prime.

It is a super-2 number, since 2×440540431² = 388151742691331522, 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 = 440540396 and 440540405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440540437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24051 + ... + 38203.

It is an arithmetic number, because the mean of its divisors is an integer number (58342788).

Almost surely, 2^440540431 is an apocalyptic number.

440540431 is a deficient number, since it is larger than the sum of its proper divisors (26201873).

440540431 is a wasteful number, since it uses less digits than its factorization.

440540431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16001.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 440540431 is about 20989.0550287525. The cubic root of 440540431 is about 760.9017637472.

Adding to 440540431 its reverse (134045044), we get a palindrome (574585475).

The spelling of 440540431 in words is "four hundred forty million, five hundred forty thousand, four hundred thirty-one".