440778 has 16 divisors (see below), whose sum is σ = 949536. Its totient is φ = 135600.

The previous prime is 440773. The next prime is 440807. The reversal of 440778 is 877044.

It is not an unprimeable number, because it can be changed into a prime (440773) by changing a digit.

440778 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 7 ways as a sum of consecutive naturals, for example, 2748 + ... + 2903.

It is an arithmetic number, because the mean of its divisors is an integer number (59346).

2⁴⁴⁰⁷⁷⁸ is an apocalyptic number.

440778 is an abundant number, since it is smaller than the sum of its proper divisors (508758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

440778 is a wasteful number, since it uses less digits than its factorization.

440778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5669.

The product of its (nonzero) digits is 6272, while the sum is 30.

The square root of 440778 is about 663.9111386323. The cubic root of 440778 is about 76.1038515620.

The spelling of 440778 in words is "four hundred forty thousand, seven hundred seventy-eight".