1720425600 has 576 divisors, whose sum is σ = 6629575680. Its totient is φ = 423936000.

The previous prime is 1720425541. The next prime is 1720425607. The reversal of 1720425600 is 65240271.

1720425600 is a `hidden beast` number, since 17 + 2 + 0 + 42 + 5 + 600 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1720425607) 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 71 ways as a sum of consecutive naturals, for example, 36604777 + ... + 36604823.

It is an arithmetic number, because the mean of its divisors is an integer number (11509680).

Almost surely, 2^1720425600 is an apocalyptic number.

1720425600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1720425600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3314787840).

1720425600 is an abundant number, since it is smaller than the sum of its proper divisors (4909150080).

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

1720425600 is a wasteful number, since it uses less digits than its factorization.

1720425600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149 (or 129 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 1720425600 is about 41478.0134529126. The cubic root of 1720425600 is about 1198.2440985951.

Adding to 1720425600 its reverse (65240271), we get a palindrome (1785665871).

The spelling of 1720425600 in words is "one billion, seven hundred twenty million, four hundred twenty-five thousand, six hundred".