440730 has 48 divisors (see below), whose sum is σ = 1179360. Its totient is φ = 114144.

The previous prime is 440723. The next prime is 440731. The reversal of 440730 is 37044.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (440731) 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 23 ways as a sum of consecutive naturals, for example, 5269 + ... + 5351.

It is an arithmetic number, because the mean of its divisors is an integer number (24570).

2⁴⁴⁰⁷³⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 440730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (589680).

440730 is an abundant number, since it is smaller than the sum of its proper divisors (738630).

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

440730 is a wasteful number, since it uses less digits than its factorization.

440730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155 (or 152 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 440730 is about 663.8749882320. The cubic root of 440730 is about 76.1010889336.

Adding to 440730 its reverse (37044), we get a palindrome (477774).

The spelling of 440730 in words is "four hundred forty thousand, seven hundred thirty".