866872788 has 24 divisors (see below), whose sum is σ = 2024084160. Its totient is φ = 288760320.

The previous prime is 866872771. The next prime is 866872793. The reversal of 866872788 is 887278668.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5773 + ... + 42036.

It is an arithmetic number, because the mean of its divisors is an integer number (84336840).

Almost surely, 2^866872788 is an apocalyptic number.

It is an amenable number.

866872788 is an abundant number, since it is smaller than the sum of its proper divisors (1157211372).

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

866872788 is a wasteful number, since it uses less digits than its factorization.

866872788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49327 (or 49325 counting only the distinct ones).

The product of its digits is 14450688, while the sum is 60.

The square root of 866872788 is about 29442.7034764133. The cubic root of 866872788 is about 953.4950806565.

The spelling of 866872788 in words is "eight hundred sixty-six million, eight hundred seventy-two thousand, seven hundred eighty-eight".