72855085 has 4 divisors (see below), whose sum is σ = 87426108. Its totient is φ = 58284064.

The previous prime is 72855067. The next prime is 72855089. The reversal of 72855085 is 58055827.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58055827 = 643 ⋅90289.

It can be written as a sum of positive squares in 2 ways, for example, as 29571844 + 43283241 = 5438^2 + 6579^2 .

It is a cyclic number.

It is not a de Polignac number, because 72855085 - 2¹⁷ = 72724013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72855089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7285504 + ... + 7285513.

It is an arithmetic number, because the mean of its divisors is an integer number (21856527).

Almost surely, 2^72855085 is an apocalyptic number.

It is an amenable number.

72855085 is a deficient number, since it is larger than the sum of its proper divisors (14571023).

72855085 is a wasteful number, since it uses less digits than its factorization.

72855085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14571022.

The product of its (nonzero) digits is 112000, while the sum is 40.

The square root of 72855085 is about 8535.5190234689. The cubic root of 72855085 is about 417.6571844109.

The spelling of 72855085 in words is "seventy-two million, eight hundred fifty-five thousand, eighty-five".