2861392986 has 64 divisors (see below), whose sum is σ = 6474470400. Its totient is φ = 936519408.

The previous prime is 2861392867. The next prime is 2861392997. The reversal of 2861392986 is 6892931682.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1297761 + ... + 1299963.

It is an arithmetic number, because the mean of its divisors is an integer number (101163600).

Almost surely, 2^2861392986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2861392986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3237235200).

2861392986 is an abundant number, since it is smaller than the sum of its proper divisors (3613077414).

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

2861392986 is a wasteful number, since it uses less digits than its factorization.

2861392986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2640 (or 2634 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 54.

The square root of 2861392986 is about 53491.9899237260. The cubic root of 2861392986 is about 1419.6866639864.

The spelling of 2861392986 in words is "two billion, eight hundred sixty-one million, three hundred ninety-two thousand, nine hundred eighty-six".