1449645220 has 12 divisors (see below), whose sum is σ = 3044255004. Its totient is φ = 579858080.

The previous prime is 1449645209. The next prime is 1449645257. The reversal of 1449645220 is 225469441.

It can be written as a sum of positive squares in 2 ways, for example, as 740275264 + 709369956 = 27208^2 + 26634^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1449645220.

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, 36241111 + ... + 36241150.

It is an arithmetic number, because the mean of its divisors is an integer number (253687917).

Almost surely, 2^1449645220 is an apocalyptic number.

1449645220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1449645220 is an abundant number, since it is smaller than the sum of its proper divisors (1594609784).

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

1449645220 is a wasteful number, since it uses less digits than its factorization.

1449645220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72482270 (or 72482268 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 1449645220 is about 38074.2067547047. The cubic root of 1449645220 is about 1131.7588762107.

The spelling of 1449645220 in words is "one billion, four hundred forty-nine million, six hundred forty-five thousand, two hundred twenty".