87285865 has 8 divisors (see below), whose sum is σ = 104951880. Its totient is φ = 69689472.

The previous prime is 87285841. The next prime is 87285883. The reversal of 87285865 is 56858278.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 42302016 + 44983849 = 6504^2 + 6707^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87285865 is a prime.

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, 14604 + ... + 19693.

It is an arithmetic number, because the mean of its divisors is an integer number (13118985).

Almost surely, 2^87285865 is an apocalyptic number.

It is an amenable number.

87285865 is a deficient number, since it is larger than the sum of its proper divisors (17666015).

87285865 is a wasteful number, since it uses less digits than its factorization.

87285865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34811.

The product of its digits is 1075200, while the sum is 49.

The square root of 87285865 is about 9342.6904583209. The cubic root of 87285865 is about 443.5895501385.

The spelling of 87285865 in words is "eighty-seven million, two hundred eighty-five thousand, eight hundred sixty-five".