861633946 has 8 divisors (see below), whose sum is σ = 1294610400. Its totient is φ = 430097148.

The previous prime is 861633937. The next prime is 861634013. The reversal of 861633946 is 649336168.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 861633896 and 861633905.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 358416 + ... + 360811.

It is an arithmetic number, because the mean of its divisors is an integer number (161826300).

Almost surely, 2^861633946 is an apocalyptic number.

861633946 is a deficient number, since it is larger than the sum of its proper divisors (432976454).

861633946 is a wasteful number, since it uses less digits than its factorization.

861633946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719828.

The product of its digits is 559872, while the sum is 46.

The square root of 861633946 is about 29353.6019254878. The cubic root of 861633946 is about 951.5704204612.

It can be divided in two parts, 86163 and 3946, that added together give a palindrome (90109).

The spelling of 861633946 in words is "eight hundred sixty-one million, six hundred thirty-three thousand, nine hundred forty-six".