866396928 has 144 divisors (see below), whose sum is σ = 2405967872. Its totient is φ = 276480000.

The previous prime is 866396873. The next prime is 866396929. The reversal of 866396928 is 829693668.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866396929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3594888 + ... + 3595128.

Almost surely, 2^866396928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 866396928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1202983936).

866396928 is an abundant number, since it is smaller than the sum of its proper divisors (1539570944).

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

866396928 is a wasteful number, since it uses less digits than its factorization.

866396928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442 (or 428 counting only the distinct ones).

The product of its digits is 6718464, while the sum is 57.

The square root of 866396928 is about 29434.6212477756. The cubic root of 866396928 is about 953.3205786134.

The spelling of 866396928 in words is "eight hundred sixty-six million, three hundred ninety-six thousand, nine hundred twenty-eight".