861908 has 12 divisors (see below), whose sum is σ = 1519392. Its totient is φ = 427800.

The previous prime is 861907. The next prime is 861929. The reversal of 861908 is 809168.

861908 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110 + ... + 1317.

It is an arithmetic number, because the mean of its divisors is an integer number (126616).

2⁸⁶¹⁹⁰⁸ is an apocalyptic number.

It is an amenable number.

861908 is a deficient number, since it is larger than the sum of its proper divisors (657484).

861908 is a wasteful number, since it uses less digits than its factorization.

861908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1582 (or 1580 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 861908 is about 928.3900042547. The cubic root of 861908 is about 95.1671296260.

It can be divided in two parts, 8 and 61908, that added together give a palindrome (61916).

The spelling of 861908 in words is "eight hundred sixty-one thousand, nine hundred eight".