1445520432 has 20 divisors (see below), whose sum is σ = 3734261240. Its totient is φ = 481840128.

The previous prime is 1445520413. The next prime is 1445520443. The reversal of 1445520432 is 2340255441.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1445520432.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15057457 + ... + 15057552.

It is an arithmetic number, because the mean of its divisors is an integer number (186713062).

Almost surely, 2^1445520432 is an apocalyptic number.

1445520432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1445520432 is an abundant number, since it is smaller than the sum of its proper divisors (2288740808).

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

1445520432 is a wasteful number, since it uses less digits than its factorization.

1445520432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30115020 (or 30115014 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

The square root of 1445520432 is about 38020.0004208311. Note that the first 3 decimals coincide. The cubic root of 1445520432 is about 1130.6844293877.

Adding to 1445520432 its reverse (2340255441), we get a palindrome (3785775873).

The spelling of 1445520432 in words is "one billion, four hundred forty-five million, five hundred twenty thousand, four hundred thirty-two".