866829504 has 56 divisors (see below), whose sum is σ = 2302751808. Its totient is φ = 287776000.

The previous prime is 866829487. The next prime is 866829511. The reversal of 866829504 is 405928668.

It is a happy number.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39199 + ... + 57185.

It is an arithmetic number, because the mean of its divisors is an integer number (41120568).

Almost surely, 2^866829504 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 866829504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1151375904).

866829504 is an abundant number, since it is smaller than the sum of its proper divisors (1435922304).

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

866829504 is a wasteful number, since it uses less digits than its factorization.

866829504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18253 (or 18243 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 48.

The square root of 866829504 is about 29441.9684124550. The cubic root of 866829504 is about 953.4792106740.

The spelling of 866829504 in words is "eight hundred sixty-six million, eight hundred twenty-nine thousand, five hundred four".