720023680 has 64 divisors (see below), whose sum is σ = 1724609880. Its totient is φ = 287457280.

The previous prime is 720023659. The next prime is 720023693. The reversal of 720023680 is 86320027.

It can be written as a sum of positive squares in 4 ways, for example, as 516561984 + 203461696 = 22728^2 + 14264^2 .

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 563202 + ... + 564478.

Almost surely, 2^720023680 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 720023680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (862304940).

720023680 is an abundant number, since it is smaller than the sum of its proper divisors (1004586200).

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

720023680 is a wasteful number, since it uses less digits than its factorization.

720023680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2177 (or 2165 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 720023680 is about 26833.2569771170. The cubic root of 720023680 is about 896.2907750986.

The spelling of 720023680 in words is "seven hundred twenty million, twenty-three thousand, six hundred eighty".