87717285 has 24 divisors (see below), whose sum is σ = 158655744. Its totient is φ = 44748000.

The previous prime is 87717283. The next prime is 87717299. The reversal of 87717285 is 58271778.

It is not a de Polignac number, because 87717285 - 2¹ = 87717283 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 87717285.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87717283) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41341 + ... + 43410.

It is an arithmetic number, because the mean of its divisors is an integer number (6610656).

Almost surely, 2^87717285 is an apocalyptic number.

It is an amenable number.

87717285 is a deficient number, since it is larger than the sum of its proper divisors (70938459).

87717285 is a wasteful number, since it uses less digits than its factorization.

87717285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84785 (or 84782 counting only the distinct ones).

The product of its digits is 219520, while the sum is 45.

The square root of 87717285 is about 9365.7506372954. The cubic root of 87717285 is about 444.3191794316.

The spelling of 87717285 in words is "eighty-seven million, seven hundred seventeen thousand, two hundred eighty-five".