720601056 has 144 divisors (see below), whose sum is σ = 2445040080. Its totient is φ = 205873920.

The previous prime is 720601027. The next prime is 720601061. The reversal of 720601056 is 650106027.

720601056 is a `hidden beast` number, since 7 + 2 + 0 + 601 + 0 + 56 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33826 + ... + 50846.

It is an arithmetic number, because the mean of its divisors is an integer number (16979445).

Almost surely, 2^720601056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 720601056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1222520040).

720601056 is an abundant number, since it is smaller than the sum of its proper divisors (1724439024).

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

720601056 is a wasteful number, since it uses less digits than its factorization.

720601056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17054 (or 17033 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 720601056 is about 26844.0134108147. The cubic root of 720601056 is about 896.5302850546.

The spelling of 720601056 in words is "seven hundred twenty million, six hundred one thousand, fifty-six".