72230320 has 40 divisors (see below), whose sum is σ = 168623136. Its totient is φ = 28773888.

The previous prime is 72230317. The next prime is 72230357. The reversal of 72230320 is 2303227.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19324 + ... + 22756.

Almost surely, 2^72230320 is an apocalyptic number.

It is an amenable number.

72230320 is an abundant number, since it is smaller than the sum of its proper divisors (96392816).

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

72230320 is a wasteful number, since it uses less digits than its factorization.

72230320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3709 (or 3703 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 19.

The square root of 72230320 is about 8498.8422740983. The cubic root of 72230320 is about 416.4598895785.

Adding to 72230320 its reverse (2303227), we get a palindrome (74533547).

The spelling of 72230320 in words is "seventy-two million, two hundred thirty thousand, three hundred twenty".