72885691 has 8 divisors (see below), whose sum is σ = 76820480. Its totient is φ = 68960808.

The previous prime is 72885661. The next prime is 72885697. The reversal of 72885691 is 19658827.

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 72885691 - 2²¹ = 70788539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72885697) 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 7 ways as a sum of consecutive naturals, for example, 16390 + ... + 20356.

It is an arithmetic number, because the mean of its divisors is an integer number (9602560).

Almost surely, 2^72885691 is an apocalyptic number.

72885691 is a deficient number, since it is larger than the sum of its proper divisors (3934789).

72885691 is a wasteful number, since it uses less digits than its factorization.

72885691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4953.

The product of its digits is 241920, while the sum is 46.

The square root of 72885691 is about 8537.3116963128. The cubic root of 72885691 is about 417.7156613459.

The spelling of 72885691 in words is "seventy-two million, eight hundred eighty-five thousand, six hundred ninety-one".