1445809380 has 24 divisors (see below), whose sum is σ = 4048266432. Its totient is φ = 385549152.

The previous prime is 1445809367. The next prime is 1445809381. The reversal of 1445809380 is 839085441.

It is not an unprimeable number, because it can be changed into a prime (1445809381) 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, 12048352 + ... + 12048471.

It is an arithmetic number, because the mean of its divisors is an integer number (168677768).

Almost surely, 2^1445809380 is an apocalyptic number.

1445809380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1445809380 is an abundant number, since it is smaller than the sum of its proper divisors (2602457052).

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

1445809380 is a wasteful number, since it uses less digits than its factorization.

1445809380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24096835 (or 24096833 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 1445809380 is about 38023.8001783094. The cubic root of 1445809380 is about 1130.7597626336.

The spelling of 1445809380 in words is "one billion, four hundred forty-five million, eight hundred nine thousand, three hundred eighty".