720841824 has 72 divisors (see below), whose sum is σ = 2058081480. Its totient is φ = 239321088.

The previous prime is 720841813. The next prime is 720841829. The reversal of 720841824 is 428148027.

720841824 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×720841824² = 1039225870455293952, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720841829) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69147 + ... + 78885.

It is an arithmetic number, because the mean of its divisors is an integer number (28584465).

Almost surely, 2^720841824 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 720841824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1029040740).

720841824 is an abundant number, since it is smaller than the sum of its proper divisors (1337239656).

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

720841824 is a wasteful number, since it uses less digits than its factorization.

720841824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10012 (or 10001 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 36.

The square root of 720841824 is about 26848.4976115983. The cubic root of 720841824 is about 896.6301238238.

The spelling of 720841824 in words is "seven hundred twenty million, eight hundred forty-one thousand, eight hundred twenty-four".