1445144520 has 128 divisors (see below), whose sum is σ = 4481568000. Its totient is φ = 372519936.

The previous prime is 1445144513. The next prime is 1445144543. The reversal of 1445144520 is 254415441.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 740506 + ... + 742454.

It is an arithmetic number, because the mean of its divisors is an integer number (35012250).

Almost surely, 2^1445144520 is an apocalyptic number.

1445144520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1445144520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2240784000).

1445144520 is an abundant number, since it is smaller than the sum of its proper divisors (3036423480).

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

1445144520 is a wasteful number, since it uses less digits than its factorization.

1445144520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2167 (or 2163 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 30.

The square root of 1445144520 is about 38015.0564908169. The cubic root of 1445144520 is about 1130.5864082448.

Adding to 1445144520 its reverse (254415441), we get a palindrome (1699559961).

The spelling of 1445144520 in words is "one billion, four hundred forty-five million, one hundred forty-four thousand, five hundred twenty".