440028 has 36 divisors (see below), whose sum is σ = 1179360. Its totient is φ = 137856.

The previous prime is 440023. The next prime is 440039. The reversal of 440028 is 820044.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

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

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 440028.

It is not an unprimeable number, because it can be changed into a prime (440023) by changing a digit.

440028 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 253 + ... + 971.

It is an arithmetic number, because the mean of its divisors is an integer number (32760).

2⁴⁴⁰⁰²⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 440028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (589680).

440028 is an abundant number, since it is smaller than the sum of its proper divisors (739332).

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

440028 is a wasteful number, since it uses less digits than its factorization.

440028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746 (or 741 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 440028 is about 663.3460635294. The cubic root of 440028 is about 76.0606625548.

The spelling of 440028 in words is "four hundred forty thousand, twenty-eight".