861252008 has 16 divisors (see below), whose sum is σ = 1615168500. Its totient is φ = 430540416.

The previous prime is 861251999. The next prime is 861252019. The reversal of 861252008 is 800252168.

861252008 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 514473124 + 346778884 = 22682^2 + 18622^2 .

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, 58058 + ... + 71366.

Almost surely, 2^861252008 is an apocalyptic number.

It is an amenable number.

861252008 is a deficient number, since it is larger than the sum of its proper divisors (753916492).

861252008 is a wasteful number, since it uses less digits than its factorization.

861252008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21404 (or 21400 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 861252008 is about 29347.0953929005. The cubic root of 861252008 is about 951.4297982480.

The spelling of 861252008 in words is "eight hundred sixty-one million, two hundred fifty-two thousand, eight".