861803862 has 16 divisors (see below), whose sum is σ = 1814324160. Its totient is φ = 272148552.

The previous prime is 861803861. The next prime is 861803863. The reversal of 861803862 is 268308168.

It is an interprime number because it is at equal distance from previous prime (861803861) and next prime (861803863).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861803861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3779728 + ... + 3779955.

It is an arithmetic number, because the mean of its divisors is an integer number (113395260).

Almost surely, 2^861803862 is an apocalyptic number.

861803862 is an abundant number, since it is smaller than the sum of its proper divisors (952520298).

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

861803862 is a wasteful number, since it uses less digits than its factorization.

861803862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7559707.

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 861803862 is about 29356.4960783810. The cubic root of 861803862 is about 951.6329669030.

The spelling of 861803862 in words is "eight hundred sixty-one million, eight hundred three thousand, eight hundred sixty-two".