72230730 has 128 divisors (see below), whose sum is σ = 206841600. Its totient is φ = 15912960.

The previous prime is 72230701. The next prime is 72230731. The reversal of 72230730 is 3703227.

It is a self number, because there is not a number n which added to its sum of digits gives 72230730.

It is not an unprimeable number, because it can be changed into a prime (72230731) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 484696 + ... + 484844.

It is an arithmetic number, because the mean of its divisors is an integer number (1615950).

Almost surely, 2^72230730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72230730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103420800).

72230730 is an abundant number, since it is smaller than the sum of its proper divisors (134610870).

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

72230730 is a wasteful number, since it uses less digits than its factorization.

72230730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296.

The product of its (nonzero) digits is 1764, while the sum is 24.

The square root of 72230730 is about 8498.8663949965. The cubic root of 72230730 is about 416.4606775589.

Adding to 72230730 its reverse (3703227), we get a palindrome (75933957).

The spelling of 72230730 in words is "seventy-two million, two hundred thirty thousand, seven hundred thirty".