72647426 has 16 divisors (see below), whose sum is σ = 115595424. Its totient is φ = 34123584.

The previous prime is 72647417. The next prime is 72647437. The reversal of 72647426 is 62474627.

It is a self number, because there is not a number n which added to its sum of digits gives 72647426.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20201 + ... + 23523.

It is an arithmetic number, because the mean of its divisors is an integer number (7224714).

Almost surely, 2^72647426 is an apocalyptic number.

72647426 is a deficient number, since it is larger than the sum of its proper divisors (42947998).

72647426 is a wasteful number, since it uses less digits than its factorization.

72647426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3985.

The product of its digits is 112896, while the sum is 38.

The square root of 72647426 is about 8523.3459392424. The cubic root of 72647426 is about 417.2599904174.

The spelling of 72647426 in words is "seventy-two million, six hundred forty-seven thousand, four hundred twenty-six".