440631 has 12 divisors (see below), whose sum is σ = 642408. Its totient is φ = 291024.

The previous prime is 440581. The next prime is 440641. The reversal of 440631 is 136044.

It is not a de Polignac number, because 440631 - 2⁶ = 440567 is a prime.

It is a super-2 number, since 2×440631² = 388311356322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1416 + ... + 1698.

It is an arithmetic number, because the mean of its divisors is an integer number (53534).

2⁴⁴⁰⁶³¹ is an apocalyptic number.

440631 is a deficient number, since it is larger than the sum of its proper divisors (201777).

440631 is a wasteful number, since it uses less digits than its factorization.

440631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462 (or 459 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 440631 is about 663.8004218137. The cubic root of 440631 is about 76.0953903789.

Adding to 440631 its reverse (136044), we get a palindrome (576675).

The spelling of 440631 in words is "four hundred forty thousand, six hundred thirty-one".