4451520440 has 32 divisors (see below), whose sum is σ = 10142712000. Its totient is φ = 1758067584.

The previous prime is 4451520427. The next prime is 4451520443. The reversal of 4451520440 is 440251544.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4451520443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 701195 + ... + 707514.

It is an arithmetic number, because the mean of its divisors is an integer number (316959750).

Almost surely, 2^4451520440 is an apocalyptic number.

4451520440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4451520440 is an abundant number, since it is smaller than the sum of its proper divisors (5691191560).

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

4451520440 is a wasteful number, since it uses less digits than its factorization.

4451520440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1408799 (or 1408795 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 29.

The square root of 4451520440 is about 66719.7155269715. The cubic root of 4451520440 is about 1645.0134655205.

Adding to 4451520440 its reverse (440251544), we get a palindrome (4891771984).

The spelling of 4451520440 in words is "four billion, four hundred fifty-one million, five hundred twenty thousand, four hundred forty".