72241730 has 32 divisors (see below), whose sum is σ = 142207488. Its totient is φ = 26204800.

The previous prime is 72241681. The next prime is 72241733. The reversal of 72241730 is 3714227.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 72241730.

It is not an unprimeable number, because it can be changed into a prime (72241733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83279 + ... + 84141.

It is an arithmetic number, because the mean of its divisors is an integer number (4443984).

Almost surely, 2^72241730 is an apocalyptic number.

72241730 is a deficient number, since it is larger than the sum of its proper divisors (69965758).

72241730 is a wasteful number, since it uses less digits than its factorization.

72241730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1642.

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 72241730 is about 8499.5135154902. The cubic root of 72241730 is about 416.4818173837.

Adding to 72241730 its reverse (3714227), we get a palindrome (75955957).

The spelling of 72241730 in words is "seventy-two million, two hundred forty-one thousand, seven hundred thirty".