1720444245 has 32 divisors (see below), whose sum is σ = 2967148800. Its totient is φ = 846219264.

The previous prime is 1720444211. The next prime is 1720444249. The reversal of 1720444245 is 5424440271.

It is not a de Polignac number, because 1720444245 - 2⁶ = 1720444181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1720444249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 253861 + ... + 260549.

It is an arithmetic number, because the mean of its divisors is an integer number (92723400).

Almost surely, 2^1720444245 is an apocalyptic number.

1720444245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1720444245 is a deficient number, since it is larger than the sum of its proper divisors (1246704555).

1720444245 is a wasteful number, since it uses less digits than its factorization.

1720444245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8029.

The product of its (nonzero) digits is 35840, while the sum is 33.

The square root of 1720444245 is about 41478.2382099337. The cubic root of 1720444245 is about 1198.2484272101.

The spelling of 1720444245 in words is "one billion, seven hundred twenty million, four hundred forty-four thousand, two hundred forty-five".