72285685 has 4 divisors (see below), whose sum is σ = 86742828. Its totient is φ = 57828544.

The previous prime is 72285677. The next prime is 72285691. The reversal of 72285685 is 58658227.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26357956 + 45927729 = 5134^2 + 6777^2 .

It is a cyclic number.

It is not a de Polignac number, because 72285685 - 2³ = 72285677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7228564 + ... + 7228573.

It is an arithmetic number, because the mean of its divisors is an integer number (21685707).

Almost surely, 2^72285685 is an apocalyptic number.

It is an amenable number.

72285685 is a deficient number, since it is larger than the sum of its proper divisors (14457143).

72285685 is a wasteful number, since it uses less digits than its factorization.

72285685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14457142.

The product of its digits is 268800, while the sum is 43.

The square root of 72285685 is about 8502.0988585172. The cubic root of 72285685 is about 416.5662687884.

The spelling of 72285685 in words is "seventy-two million, two hundred eighty-five thousand, six hundred eighty-five".