866399232 has 88 divisors (see below), whose sum is σ = 2327029600. Its totient is φ = 286580736.

The previous prime is 866399227. The next prime is 866399243. The reversal of 866399232 is 232993668.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 425994 + ... + 428022.

Almost surely, 2^866399232 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 866399232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1163514800).

866399232 is an abundant number, since it is smaller than the sum of its proper divisors (1460630368).

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

866399232 is a wasteful number, since it uses less digits than its factorization.

866399232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2191 (or 2173 counting only the distinct ones).

The product of its digits is 839808, while the sum is 48.

The square root of 866399232 is about 29434.6603853348. The cubic root of 866399232 is about 953.3214236644.

The spelling of 866399232 in words is "eight hundred sixty-six million, three hundred ninety-nine thousand, two hundred thirty-two".