866019852 has 36 divisors (see below), whose sum is σ = 2192548176. Its totient is φ = 288219360.

The previous prime is 866019821. The next prime is 866019857. The reversal of 866019852 is 258910668.

866019852 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 866019798 and 866019807.

It is not an unprimeable number, because it can be changed into a prime (866019857) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4702 + ... + 41882.

It is an arithmetic number, because the mean of its divisors is an integer number (60904116).

Almost surely, 2^866019852 is an apocalyptic number.

It is an amenable number.

866019852 is an abundant number, since it is smaller than the sum of its proper divisors (1326528324).

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

866019852 is a wasteful number, since it uses less digits than its factorization.

866019852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37838 (or 37833 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 866019852 is about 29428.2152364020. The cubic root of 866019852 is about 953.1822561494.

The spelling of 866019852 in words is "eight hundred sixty-six million, nineteen thousand, eight hundred fifty-two".