861045862 has 8 divisors (see below), whose sum is σ = 1293957792. Its totient is φ = 429726600.

The previous prime is 861045859. The next prime is 861045883. The reversal of 861045862 is 268540168.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 396814 + ... + 398977.

It is an arithmetic number, because the mean of its divisors is an integer number (161744724).

Almost surely, 2^861045862 is an apocalyptic number.

861045862 is a deficient number, since it is larger than the sum of its proper divisors (432911930).

861045862 is a wasteful number, since it uses less digits than its factorization.

861045862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796334.

The product of its (nonzero) digits is 92160, while the sum is 40.

The square root of 861045862 is about 29343.5829782254. The cubic root of 861045862 is about 951.3538819865.

The spelling of 861045862 in words is "eight hundred sixty-one million, forty-five thousand, eight hundred sixty-two".