861281008 has 40 divisors (see below), whose sum is σ = 1909306368. Its totient is φ = 368697792.

The previous prime is 861280993. The next prime is 861281009. The reversal of 861281008 is 800182168.

861281008 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861281009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106185 + ... + 114007.

Almost surely, 2^861281008 is an apocalyptic number.

It is an amenable number.

861281008 is an abundant number, since it is smaller than the sum of its proper divisors (1048025360).

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

861281008 is a wasteful number, since it uses less digits than its factorization.

861281008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8821 (or 8815 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 34.

The square root of 861281008 is about 29347.5894751170. The cubic root of 861281008 is about 951.4404769476.

The spelling of 861281008 in words is "eight hundred sixty-one million, two hundred eighty-one thousand, eight".