72446447 has 8 divisors (see below), whose sum is σ = 73272816. Its totient is φ = 71623552.

The previous prime is 72446419. The next prime is 72446453. The reversal of 72446447 is 74464427.

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

It is a cyclic number.

It is not a de Polignac number, because 72446447 - 2⁸ = 72446191 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72446447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72446417) 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, 76028 + ... + 76974.

It is an arithmetic number, because the mean of its divisors is an integer number (9159102).

Almost surely, 2^72446447 is an apocalyptic number.

72446447 is a deficient number, since it is larger than the sum of its proper divisors (826369).

72446447 is a wasteful number, since it uses less digits than its factorization.

72446447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1737.

The product of its digits is 150528, while the sum is 38.

The square root of 72446447 is about 8511.5478615819. The cubic root of 72446447 is about 416.8748519818.

The spelling of 72446447 in words is "seventy-two million, four hundred forty-six thousand, four hundred forty-seven".