72815347 has 8 divisors (see below), whose sum is σ = 79499952. Its totient is φ = 66141600.

The previous prime is 72815339. The next prime is 72815387. The reversal of 72815347 is 74351827.

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 72815347 - 2³ = 72815339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72815387) 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, 18693 + ... + 22249.

It is an arithmetic number, because the mean of its divisors is an integer number (9937494).

Almost surely, 2^72815347 is an apocalyptic number.

72815347 is a deficient number, since it is larger than the sum of its proper divisors (6684605).

72815347 is a wasteful number, since it uses less digits than its factorization.

72815347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5429.

The product of its digits is 47040, while the sum is 37.

The square root of 72815347 is about 8533.1909037593. The cubic root of 72815347 is about 417.5812351040.

The spelling of 72815347 in words is "seventy-two million, eight hundred fifteen thousand, three hundred forty-seven".