440390 has 16 divisors (see below), whose sum is σ = 810432. Its totient is φ = 172224.

The previous prime is 440389. The next prime is 440393. The reversal of 440390 is 93044.

440390 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2 + ... + 938.

It is an arithmetic number, because the mean of its divisors is an integer number (50652).

2⁴⁴⁰³⁹⁰ is an apocalyptic number.

440390 is a deficient number, since it is larger than the sum of its proper divisors (370042).

440390 is a wasteful number, since it uses less digits than its factorization.

440390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 440390 is about 663.6188665190. The cubic root of 440390 is about 76.0815145709.

The spelling of 440390 in words is "four hundred forty thousand, three hundred ninety".