861861862 has 8 divisors (see below), whose sum is σ = 1301027616. Its totient is φ = 428185992.

The previous prime is 861861851. The next prime is 861861877. The reversal of 861861862 is 268168168.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1372078 + ... + 1372705.

It is an arithmetic number, because the mean of its divisors is an integer number (162628452).

Almost surely, 2^861861862 is an apocalyptic number.

861861862 is a deficient number, since it is larger than the sum of its proper divisors (439165754).

861861862 is a wasteful number, since it uses less digits than its factorization.

861861862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2744942.

The product of its digits is 221184, while the sum is 46.

The square root of 861861862 is about 29357.4839180745. The cubic root of 861861862 is about 951.6543149446.

The spelling of 861861862 in words is "eight hundred sixty-one million, eight hundred sixty-one thousand, eight hundred sixty-two".