72726242 has 8 divisors (see below), whose sum is σ = 109153116. Its totient is φ = 36341872.

The previous prime is 72726239. The next prime is 72726257. The reversal of 72726242 is 24262727.

It can be written as a sum of positive squares in 2 ways, for example, as 72573361 + 152881 = 8519^2 + 391^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 72726199 and 72726208.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5933 + ... + 13440.

Almost surely, 2^72726242 is an apocalyptic number.

72726242 is a deficient number, since it is larger than the sum of its proper divisors (36426874).

72726242 is a wasteful number, since it uses less digits than its factorization.

72726242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21252.

The product of its digits is 18816, while the sum is 32.

The square root of 72726242 is about 8527.9682222672. The cubic root of 72726242 is about 417.4108325477.

Adding to 72726242 its reverse (24262727), we get a palindrome (96988969).

The spelling of 72726242 in words is "seventy-two million, seven hundred twenty-six thousand, two hundred forty-two".