72240242 has 16 divisors (see below), whose sum is σ = 120774240. Its totient is φ = 32205888.

The previous prime is 72240241. The next prime is 72240251. The reversal of 72240242 is 24204227.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (72240241) 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, 55268 + ... + 56559.

It is an arithmetic number, because the mean of its divisors is an integer number (7548390).

Almost surely, 2^72240242 is an apocalyptic number.

72240242 is a deficient number, since it is larger than the sum of its proper divisors (48533998).

72240242 is a wasteful number, since it uses less digits than its factorization.

72240242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111865.

The product of its (nonzero) digits is 1792, while the sum is 23.

The square root of 72240242 is about 8499.4259806177. The cubic root of 72240242 is about 416.4789578675.

Adding to 72240242 its reverse (24204227), we get a palindrome (96444469).

The spelling of 72240242 in words is "seventy-two million, two hundred forty thousand, two hundred forty-two".