861898968 has 160 divisors (see below), whose sum is σ = 2780870400. Its totient is φ = 244306368.

The previous prime is 861898907. The next prime is 861898981. The reversal of 861898968 is 869898168.

861898968 is a `hidden beast` number, since 8 + 618 + 9 + 8 + 9 + 6 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 629821 + ... + 631187.

It is an arithmetic number, because the mean of its divisors is an integer number (17380440).

Almost surely, 2^861898968 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 861898968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1390435200).

861898968 is an abundant number, since it is smaller than the sum of its proper divisors (1918971432).

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

861898968 is a wasteful number, since it uses less digits than its factorization.

861898968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1531 (or 1518 counting only the distinct ones).

The product of its digits is 11943936, while the sum is 63.

The square root of 861898968 is about 29358.1158795996. The cubic root of 861898968 is about 951.6679720358.

The spelling of 861898968 in words is "eight hundred sixty-one million, eight hundred ninety-eight thousand, nine hundred sixty-eight".