440443820 has 48 divisors (see below), whose sum is σ = 984947040. Its totient is φ = 164865024.

The previous prime is 440443811. The next prime is 440443831. The reversal of 440443820 is 28344044.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57242 + ... + 64478.

It is an arithmetic number, because the mean of its divisors is an integer number (20519730).

Almost surely, 2^440443820 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 440443820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (492473520).

440443820 is an abundant number, since it is smaller than the sum of its proper divisors (544503220).

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

440443820 is a wasteful number, since it uses less digits than its factorization.

440443820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7442 (or 7440 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 29.

The square root of 440443820 is about 20986.7534411590. The cubic root of 440443820 is about 760.8461374834.

Adding to 440443820 its reverse (28344044), we get a palindrome (468787864).

The spelling of 440443820 in words is "four hundred forty million, four hundred forty-three thousand, eight hundred twenty".