1720798800 has 120 divisors (see below), whose sum is σ = 6299793216. Its totient is φ = 393323520.

The previous prime is 1720798789. The next prime is 1720798801. The reversal of 1720798800 is 88970271.

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-2 number, since 2×1720798800² = 5922297020162880000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1720798801) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 94029 + ... + 110828.

Almost surely, 2^1720798800 is an apocalyptic number.

1720798800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1720798800 is an abundant number, since it is smaller than the sum of its proper divisors (4578994416).

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

1720798800 is a wasteful number, since it uses less digits than its factorization.

1720798800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204885 (or 204874 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 42.

The square root of 1720798800 is about 41482.5119779408. The cubic root of 1720798800 is about 1198.3307345931.

The spelling of 1720798800 in words is "one billion, seven hundred twenty million, seven hundred ninety-eight thousand, eight hundred".