861808014 has 24 divisors (see below), whose sum is σ = 1873859832. Its totient is φ = 286252560.

The previous prime is 861808001. The next prime is 861808019. The reversal of 861808014 is 410808168.

It is a self number, because there is not a number n which added to its sum of digits gives 861808014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861808019) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79497 + ... + 89684.

It is an arithmetic number, because the mean of its divisors is an integer number (78077493).

Almost surely, 2^861808014 is an apocalyptic number.

861808014 is an abundant number, since it is smaller than the sum of its proper divisors (1012051818).

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

861808014 is a wasteful number, since it uses less digits than its factorization.

861808014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169472 (or 169469 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 36.

The square root of 861808014 is about 29356.5667951823. The cubic root of 861808014 is about 951.6344951602.

The spelling of 861808014 in words is "eight hundred sixty-one million, eight hundred eight thousand, fourteen".