440021356140 has 48 divisors (see below), whose sum is σ = 1239437428992. Its totient is φ = 116636396736.

The previous prime is 440021356123. The next prime is 440021356141. The reversal of 440021356140 is 41653120044.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 440021356098 and 440021356107.

It is not an unprimeable number, because it can be changed into a prime (440021356141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21947134 + ... + 21967173.

It is an arithmetic number, because the mean of its divisors is an integer number (25821613104).

Almost surely, 2^440021356140 is an apocalyptic number.

It is an amenable number.

440021356140 is an abundant number, since it is smaller than the sum of its proper divisors (799416072852).

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

440021356140 is a wasteful number, since it uses less digits than its factorization.

440021356140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43914486 (or 43914484 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

Adding to 440021356140 its reverse (41653120044), we get a palindrome (481674476184).

The spelling of 440021356140 in words is "four hundred forty billion, twenty-one million, three hundred fifty-six thousand, one hundred forty".