861963102 has 144 divisors (see below), whose sum is σ = 2527106400. Its totient is φ = 206616960.

The previous prime is 861963083. The next prime is 861963103. The reversal of 861963102 is 201369168.

861963102 is a `hidden beast` number, since 8 + 6 + 19 + 631 + 0 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861963103) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 196024 + ... + 200372.

It is an arithmetic number, because the mean of its divisors is an integer number (17549350).

Almost surely, 2^861963102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 861963102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1263553200).

861963102 is an abundant number, since it is smaller than the sum of its proper divisors (1665143298).

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

861963102 is a wasteful number, since it uses less digits than its factorization.

861963102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4399 (or 4385 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 861963102 is about 29359.2081296482. The cubic root of 861963102 is about 951.6915760243.

It can be divided in two parts, 86196 and 3102, that added together give a palindrome (89298).

The spelling of 861963102 in words is "eight hundred sixty-one million, nine hundred sixty-three thousand, one hundred two".