72765447 has 24 divisors (see below), whose sum is σ = 101891328. Its totient is φ = 46169280.

The previous prime is 72765443. The next prime is 72765481. The reversal of 72765447 is 74456727.

It is not a de Polignac number, because 72765447 - 2² = 72765443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72765399 and 72765408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72765443) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 236868 + ... + 237174.

It is an arithmetic number, because the mean of its divisors is an integer number (4245472).

Almost surely, 2^72765447 is an apocalyptic number.

72765447 is a deficient number, since it is larger than the sum of its proper divisors (29125881).

72765447 is a wasteful number, since it uses less digits than its factorization.

72765447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439 (or 398 counting only the distinct ones).

The product of its digits is 329280, while the sum is 42.

The square root of 72765447 is about 8530.2665257306. The cubic root of 72765447 is about 417.4858245154.

The spelling of 72765447 in words is "seventy-two million, seven hundred sixty-five thousand, four hundred forty-seven".