866190944 has 12 divisors (see below), whose sum is σ = 1705313484. Its totient is φ = 433095456.

The previous prime is 866190929. The next prime is 866190967. The reversal of 866190944 is 449091668.

It is a happy number.

It is a super-2 number, since 2×866190944² = 1500573502935222272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13534202 + ... + 13534265.

It is an arithmetic number, because the mean of its divisors is an integer number (142109457).

Almost surely, 2^866190944 is an apocalyptic number.

It is an amenable number.

866190944 is a deficient number, since it is larger than the sum of its proper divisors (839122540).

866190944 is a wasteful number, since it uses less digits than its factorization.

866190944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27068477 (or 27068469 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 866190944 is about 29431.1220309386. The cubic root of 866190944 is about 953.2450226552.

The spelling of 866190944 in words is "eight hundred sixty-six million, one hundred ninety thousand, nine hundred forty-four".