440564 has 12 divisors (see below), whose sum is σ = 780864. Its totient is φ = 217464.

The previous prime is 440551. The next prime is 440567. The reversal of 440564 is 465044.

It is a happy number.

It is an Ulam number.

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 440564.

It is not an unprimeable number, because it can be changed into a prime (440567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 332 + ... + 995.

It is an arithmetic number, because the mean of its divisors is an integer number (65072).

2⁴⁴⁰⁵⁶⁴ is an apocalyptic number.

It is an amenable number.

440564 is a deficient number, since it is larger than the sum of its proper divisors (340300).

440564 is a wasteful number, since it uses less digits than its factorization.

440564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1414 (or 1412 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 440564 is about 663.7499529190. The cubic root of 440564 is about 76.0915332970.

It can be divided in two parts, 440 and 564, that multiplied together give a triangular number (248160 = T₇₀₄).

The spelling of 440564 in words is "four hundred forty thousand, five hundred sixty-four".