1720227744 has 36 divisors (see below), whose sum is σ = 4891898466. Its totient is φ = 573409152.

The previous prime is 1720227737. The next prime is 1720227763. The reversal of 1720227744 is 4477220271.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1088208144 + 632019600 = 32988^2 + 25140^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1720227699 and 1720227708.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2986219 + ... + 2986794.

Almost surely, 2^1720227744 is an apocalyptic number.

It is an amenable number.

1720227744 is an abundant number, since it is smaller than the sum of its proper divisors (3171670722).

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

1720227744 is a wasteful number, since it uses less digits than its factorization.

1720227744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5973029 (or 5973018 counting only the distinct ones).

The product of its (nonzero) digits is 43904, while the sum is 36.

The square root of 1720227744 is about 41475.6283135048. The cubic root of 1720227744 is about 1198.1981625055.

The spelling of 1720227744 in words is "one billion, seven hundred twenty million, two hundred twenty-seven thousand, seven hundred forty-four".