720530316 has 90 divisors (see below), whose sum is σ = 2070525380. Its totient is φ = 218330640.

The previous prime is 720530297. The next prime is 720530333. The reversal of 720530316 is 613035027.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 720530316.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 30015 + ... + 48393.

Almost surely, 2^720530316 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 720530316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1035262690).

720530316 is an abundant number, since it is smaller than the sum of its proper divisors (1349995064).

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

720530316 is a wasteful number, since it uses less digits than its factorization.

720530316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18417 (or 18395 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 27.

The square root of 720530316 is about 26842.6957662601. The cubic root of 720530316 is about 896.5009472182.

The spelling of 720530316 in words is "seven hundred twenty million, five hundred thirty thousand, three hundred sixteen".