866844004 has 12 divisors (see below), whose sum is σ = 1633667644. Its totient is φ = 400081824.

The previous prime is 866843981. The next prime is 866844019. The reversal of 866844004 is 400448668.

It can be written as a sum of positive squares in 2 ways, for example, as 146458404 + 720385600 = 12102^2 + 26840^2 .

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8334987 + ... + 8335090.

Almost surely, 2^866844004 is an apocalyptic number.

It is an amenable number.

866844004 is a deficient number, since it is larger than the sum of its proper divisors (766823640).

866844004 is a wasteful number, since it uses less digits than its factorization.

866844004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16670094 (or 16670092 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 40.

The square root of 866844004 is about 29442.2146585477. The cubic root of 866844004 is about 953.4845271256.

The spelling of 866844004 in words is "eight hundred sixty-six million, eight hundred forty-four thousand, four".