10000856 has 8 divisors (see below), whose sum is σ = 18751620. Its totient is φ = 5000424.

The previous prime is 10000849. The next prime is 10000867. The reversal of 10000856 is 65800001.

It is a tau number, because it is divible by the number of its divisors (8).

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, 625046 + ... + 625061.

Almost surely, 2^10000856 is an apocalyptic number.

It is an amenable number.

10000856 is a deficient number, since it is larger than the sum of its proper divisors (8750764).

10000856 is a wasteful number, since it uses less digits than its factorization.

10000856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1250113 (or 1250109 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 10000856 is about 3162.4130027560. The cubic root of 10000856 is about 215.4496161481.

Adding to 10000856 its reverse (65800001), we get a palindrome (75800857).

The spelling of 10000856 in words is "ten million, eight hundred fifty-six", and thus it is an aban number.