720442840 has 64 divisors (see below), whose sum is σ = 1769695200. Its totient is φ = 262351872.

The previous prime is 720442829. The next prime is 720442867. The reversal of 720442840 is 48244027.

720442840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28471 + ... + 47449.

Almost surely, 2^720442840 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 720442840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (884847600).

720442840 is an abundant number, since it is smaller than the sum of its proper divisors (1049252360).

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

720442840 is a wasteful number, since it uses less digits than its factorization.

720442840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19076 (or 19072 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 31.

The square root of 720442840 is about 26841.0662977461. The cubic root of 720442840 is about 896.4646658437.

Adding to 720442840 its reverse (48244027), we get a palindrome (768686867).

The spelling of 720442840 in words is "seven hundred twenty million, four hundred forty-two thousand, eight hundred forty".