72685226 has 4 divisors (see below), whose sum is σ = 109027842. Its totient is φ = 36342612.

The previous prime is 72685211. The next prime is 72685253. The reversal of 72685226 is 62258627.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 67158025 + 5527201 = 8195^2 + 2351^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 72685226.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18171305 + ... + 18171308.

Almost surely, 2^72685226 is an apocalyptic number.

72685226 is a deficient number, since it is larger than the sum of its proper divisors (36342616).

72685226 is a wasteful number, since it uses less digits than its factorization.

72685226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36342615.

The product of its digits is 80640, while the sum is 38.

The square root of 72685226 is about 8525.5630899079. The cubic root of 72685226 is about 417.3323476167.

The spelling of 72685226 in words is "seventy-two million, six hundred eighty-five thousand, two hundred twenty-six".