1445223880 has 32 divisors (see below), whose sum is σ = 3306873600. Its totient is φ = 568290496.

The previous prime is 1445223877. The next prime is 1445223887. The reversal of 1445223880 is 883225441.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1445223887) 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, 303832 + ... + 308551.

It is an arithmetic number, because the mean of its divisors is an integer number (103339800).

Almost surely, 2^1445223880 is an apocalyptic number.

1445223880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1445223880 is an abundant number, since it is smaller than the sum of its proper divisors (1861649720).

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

1445223880 is a wasteful number, since it uses less digits than its factorization.

1445223880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612453 (or 612449 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 37.

The square root of 1445223880 is about 38016.1002734368. The cubic root of 1445223880 is about 1130.6071032212.

The spelling of 1445223880 in words is "one billion, four hundred forty-five million, two hundred twenty-three thousand, eight hundred eighty".