866988828 has 18 divisors (see below), whose sum is σ = 2191555184. Its totient is φ = 288996264.

The previous prime is 866988809. The next prime is 866988839. The reversal of 866988828 is 828889668.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12041476 + ... + 12041547.

Almost surely, 2^866988828 is an apocalyptic number.

It is an amenable number.

866988828 is an abundant number, since it is smaller than the sum of its proper divisors (1324566356).

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

866988828 is a wasteful number, since it uses less digits than its factorization.

866988828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24083033 (or 24083028 counting only the distinct ones).

The product of its digits is 21233664, while the sum is 63.

The square root of 866988828 is about 29444.6740175537. The cubic root of 866988828 is about 953.5376238586.

The spelling of 866988828 in words is "eight hundred sixty-six million, nine hundred eighty-eight thousand, eight hundred twenty-eight".