720333730 has 8 divisors (see below), whose sum is σ = 1296600732. Its totient is φ = 288133488.

The previous prime is 720333727. The next prime is 720333739. The reversal of 720333730 is 37333027.

It can be written as a sum of positive squares in 2 ways, for example, as 602849809 + 117483921 = 24553^2 + 10839^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (720333739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36016677 + ... + 36016696.

Almost surely, 2^720333730 is an apocalyptic number.

720333730 is a deficient number, since it is larger than the sum of its proper divisors (576267002).

720333730 is a wasteful number, since it uses less digits than its factorization.

720333730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72033380.

The product of its (nonzero) digits is 7938, while the sum is 28.

The square root of 720333730 is about 26839.0337009364. The cubic root of 720333730 is about 896.4194074773.

Adding to 720333730 its reverse (37333027), we get a palindrome (757666757).

The spelling of 720333730 in words is "seven hundred twenty million, three hundred thirty-three thousand, seven hundred thirty".