72856105 has 8 divisors (see below), whose sum is σ = 99916992. Its totient is φ = 49958448.

The previous prime is 72856103. The next prime is 72856109. The reversal of 72856105 is 50165827.

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 72856105 - 2¹ = 72856103 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72856103) 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, 1040767 + ... + 1040836.

It is an arithmetic number, because the mean of its divisors is an integer number (12489624).

Almost surely, 2^72856105 is an apocalyptic number.

It is an amenable number.

72856105 is a deficient number, since it is larger than the sum of its proper divisors (27060887).

72856105 is a wasteful number, since it uses less digits than its factorization.

72856105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2081615.

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 72856105 is about 8535.5787735806. The cubic root of 72856105 is about 417.6591335237.

The spelling of 72856105 in words is "seventy-two million, eight hundred fifty-six thousand, one hundred five".