72447726 has 16 divisors (see below), whose sum is σ = 156041424. Its totient is φ = 22291584.

The previous prime is 72447721. The next prime is 72447737. The reversal of 72447726 is 62774427.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72447721) 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, 464331 + ... + 464486.

It is an arithmetic number, because the mean of its divisors is an integer number (9752589).

Almost surely, 2^72447726 is an apocalyptic number.

72447726 is an abundant number, since it is smaller than the sum of its proper divisors (83593698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72447726 is a wasteful number, since it uses less digits than its factorization.

72447726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 928835.

The product of its digits is 131712, while the sum is 39.

The square root of 72447726 is about 8511.6229944706. The cubic root of 72447726 is about 416.8773051952.

The spelling of 72447726 in words is "seventy-two million, four hundred forty-seven thousand, seven hundred twenty-six".