720303920 has 120 divisors (see below), whose sum is σ = 1985457744. Its totient is φ = 242231808.

The previous prime is 720303847. The next prime is 720303971. The reversal of 720303920 is 29303027.

It is a self number, because there is not a number n which added to its sum of digits gives 720303920.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 206027 + ... + 209493.

Almost surely, 2^720303920 is an apocalyptic number.

720303920 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 720303920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (992728872).

720303920 is an abundant number, since it is smaller than the sum of its proper divisors (1265153824).

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

720303920 is a wasteful number, since it uses less digits than its factorization.

720303920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3547 (or 3534 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 26.

The square root of 720303920 is about 26838.4783473281. The cubic root of 720303920 is about 896.4070416206.

Adding to 720303920 its reverse (29303027), we get a palindrome (749606947).

The spelling of 720303920 in words is "seven hundred twenty million, three hundred three thousand, nine hundred twenty".