72182885 has 8 divisors (see below), whose sum is σ = 89606520. Its totient is φ = 55754944.

The previous prime is 72182879. The next prime is 72182899. The reversal of 72182885 is 58828127.

It can be written as a sum of positive squares in 4 ways, for example, as 21687649 + 50495236 = 4657^2 + 7106^2 .

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 72182885 - 2²² = 67988581 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 248762 + ... + 249051.

It is an arithmetic number, because the mean of its divisors is an integer number (11200815).

Almost surely, 2^72182885 is an apocalyptic number.

It is an amenable number.

72182885 is a deficient number, since it is larger than the sum of its proper divisors (17423635).

72182885 is a wasteful number, since it uses less digits than its factorization.

72182885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497847.

The product of its digits is 71680, while the sum is 41.

The square root of 72182885 is about 8496.0511415598. The cubic root of 72182885 is about 416.3687039523.

The spelling of 72182885 in words is "seventy-two million, one hundred eighty-two thousand, eight hundred eighty-five".