440025020 has 72 divisors (see below), whose sum is σ = 964884816. Its totient is φ = 168521472.

The previous prime is 440025013. The next prime is 440025041. The reversal of 440025020 is 20520044.

It is a self number, because there is not a number n which added to its sum of digits gives 440025020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2699459 + ... + 2699621.

It is an arithmetic number, because the mean of its divisors is an integer number (13401178).

Almost surely, 2^440025020 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 440025020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (482442408).

440025020 is an abundant number, since it is smaller than the sum of its proper divisors (524859796).

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

440025020 is a wasteful number, since it uses less digits than its factorization.

440025020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331 (or 286 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 440025020 is about 20976.7733457746. The cubic root of 440025020 is about 760.6049085261.

Adding to 440025020 its reverse (20520044), we get a palindrome (460545064).

The spelling of 440025020 in words is "four hundred forty million, twenty-five thousand, twenty".