523320730 has 16 divisors (see below), whose sum is σ = 943431624. Its totient is φ = 209005120.

The previous prime is 523320691. The next prime is 523320751. The reversal of 523320730 is 37023325.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 321879481 + 201441249 = 17941^2 + 14193^2 .

It is a junction number, because it is equal to n+sod(n) for n = 523320695 and 523320704.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33541 + ... + 46600.

Almost surely, 2^523320730 is an apocalyptic number.

523320730 is a deficient number, since it is larger than the sum of its proper divisors (420110894).

523320730 is a wasteful number, since it uses less digits than its factorization.

523320730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80801.

The product of its (nonzero) digits is 3780, while the sum is 25.

The square root of 523320730 is about 22876.2044491651. The cubic root of 523320730 is about 805.8532829428.

The spelling of 523320730 in words is "five hundred twenty-three million, three hundred twenty thousand, seven hundred thirty".