866887536 has 40 divisors (see below), whose sum is σ = 2244856320. Its totient is φ = 288266176.

The previous prime is 866887519. The next prime is 866887543. The reversal of 866887536 is 635788668.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1440 + ... + 41663.

It is an arithmetic number, because the mean of its divisors is an integer number (56121408).

Almost surely, 2^866887536 is an apocalyptic number.

It is an amenable number.

866887536 is an abundant number, since it is smaller than the sum of its proper divisors (1377968784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

866887536 is a wasteful number, since it uses less digits than its factorization.

866887536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43533 (or 43527 counting only the distinct ones).

The product of its digits is 11612160, while the sum is 57.

The square root of 866887536 is about 29442.9539278925. The cubic root of 866887536 is about 953.5004878573.

The spelling of 866887536 in words is "eight hundred sixty-six million, eight hundred eighty-seven thousand, five hundred thirty-six".