72807449 has 32 divisors (see below), whose sum is σ = 91176960. Its totient is φ = 57153600.

The previous prime is 72807439. The next prime is 72807451. The reversal of 72807449 is 94470827.

It is a cyclic number.

It is not a de Polignac number, because 72807449 - 2⁴ = 72807433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72807409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 344954 + ... + 345164.

It is an arithmetic number, because the mean of its divisors is an integer number (2849280).

Almost surely, 2^72807449 is an apocalyptic number.

It is an amenable number.

72807449 is a deficient number, since it is larger than the sum of its proper divisors (18369511).

72807449 is a wasteful number, since it uses less digits than its factorization.

72807449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381.

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 72807449 is about 8532.7281100478. The cubic root of 72807449 is about 417.5661367491.

The spelling of 72807449 in words is "seventy-two million, eight hundred seven thousand, four hundred forty-nine".