861679910 has 32 divisors (see below), whose sum is σ = 1908954432. Its totient is φ = 272707200.

The previous prime is 861679909. The next prime is 861679919. The reversal of 861679910 is 19976168.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861679919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 472541 + ... + 474360.

It is an arithmetic number, because the mean of its divisors is an integer number (59654826).

Almost surely, 2^861679910 is an apocalyptic number.

861679910 is an abundant number, since it is smaller than the sum of its proper divisors (1047274522).

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

861679910 is a wasteful number, since it uses less digits than its factorization.

861679910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 946928.

The product of its (nonzero) digits is 163296, while the sum is 47.

The square root of 861679910 is about 29354.3848513301. The cubic root of 861679910 is about 951.5873407189.

The spelling of 861679910 in words is "eight hundred sixty-one million, six hundred seventy-nine thousand, nine hundred ten".