866363928 has 64 divisors (see below), whose sum is σ = 2322432000. Its totient is φ = 268349952.

The previous prime is 866363891. The next prime is 866363929. The reversal of 866363928 is 829363668.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866363929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18793 + ... + 45671.

It is an arithmetic number, because the mean of its divisors is an integer number (36288000).

Almost surely, 2^866363928 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 866363928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1161216000).

866363928 is an abundant number, since it is smaller than the sum of its proper divisors (1456068072).

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

866363928 is a wasteful number, since it uses less digits than its factorization.

866363928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26984 (or 26980 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 51.

The square root of 866363928 is about 29434.0606780648. The cubic root of 866363928 is about 953.3084748546.

The spelling of 866363928 in words is "eight hundred sixty-six million, three hundred sixty-three thousand, nine hundred twenty-eight".