72000085 has 4 divisors (see below), whose sum is σ = 86400108. Its totient is φ = 57600064.

The previous prime is 72000053. The next prime is 72000091. The reversal of 72000085 is 58000027.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58000027 = 19 ⋅3052633.

It can be written as a sum of positive squares in 2 ways, for example, as 44395569 + 27604516 = 6663^2 + 5254^2 .

It is a cyclic number.

It is not a de Polignac number, because 72000085 - 2⁵ = 72000053 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7200004 + ... + 7200013.

It is an arithmetic number, because the mean of its divisors is an integer number (21600027).

Almost surely, 2^72000085 is an apocalyptic number.

It is an amenable number.

72000085 is a deficient number, since it is larger than the sum of its proper divisors (14400023).

72000085 is a wasteful number, since it uses less digits than its factorization.

72000085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14400022.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 72000085 is about 8485.2863829101. The cubic root of 72000085 is about 416.0169283206.

The spelling of 72000085 in words is "seventy-two million, eighty-five", and thus it is an aban number and an uban number.