72303320 has 32 divisors (see below), whose sum is σ = 165445200. Its totient is φ = 28430208.

The previous prime is 72303307. The next prime is 72303323. The reversal of 72303320 is 2330327.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 72303292 and 72303301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72303323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12959 + ... + 17678.

Almost surely, 2^72303320 is an apocalyptic number.

It is an amenable number.

72303320 is an abundant number, since it is smaller than the sum of its proper divisors (93141880).

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

72303320 is a wasteful number, since it uses less digits than its factorization.

72303320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30707 (or 30703 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 20.

The square root of 72303320 is about 8503.1358921283. The cubic root of 72303320 is about 416.6001415569.

Adding to 72303320 its reverse (2330327), we get a palindrome (74633647).

The spelling of 72303320 in words is "seventy-two million, three hundred three thousand, three hundred twenty".