72726722 has 8 divisors (see below), whose sum is σ = 112851900. Its totient is φ = 35109424.

The previous prime is 72726683. The next prime is 72726727. The reversal of 72726722 is 22762727.

It can be written as a sum of positive squares in 2 ways, for example, as 67749361 + 4977361 = 8231^2 + 2231^2 .

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

It is not an unprimeable number, because it can be changed into a prime (72726727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 626897 + ... + 627012.

Almost surely, 2^72726722 is an apocalyptic number.

72726722 is a deficient number, since it is larger than the sum of its proper divisors (40125178).

72726722 is a wasteful number, since it uses less digits than its factorization.

72726722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1253940.

The product of its digits is 32928, while the sum is 35.

The square root of 72726722 is about 8527.9963649148. The cubic root of 72726722 is about 417.4117508625.

The spelling of 72726722 in words is "seventy-two million, seven hundred twenty-six thousand, seven hundred twenty-two".