720857280 has 448 divisors, whose sum is σ = 2765145600. Its totient is φ = 156794880.

The previous prime is 720857279. The next prime is 720857287. The reversal of 720857280 is 82758027.

720857280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (720857287) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8099476 + ... + 8099564.

It is an arithmetic number, because the mean of its divisors is an integer number (6172200).

Almost surely, 2^720857280 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 720857280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1382572800).

720857280 is an abundant number, since it is smaller than the sum of its proper divisors (2044288320).

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

720857280 is a wasteful number, since it uses less digits than its factorization.

720857280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192 (or 182 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 39.

The square root of 720857280 is about 26848.7854473904. The cubic root of 720857280 is about 896.6365321720.

The spelling of 720857280 in words is "seven hundred twenty million, eight hundred fifty-seven thousand, two hundred eighty".