7873866 has 192 divisors, whose sum is σ = 25159680. Its totient is φ = 1710720.

The previous prime is 7873849. The next prime is 7873871. The reversal of 7873866 is 6683787.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 342331 + ... + 342353.

It is an arithmetic number, because the mean of its divisors is an integer number (131040).

Almost surely, 2^7873866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7873866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12579840).

7873866 is an abundant number, since it is smaller than the sum of its proper divisors (17285814).

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

7873866 is a wasteful number, since it uses less digits than its factorization.

7873866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81 (or 78 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 7873866 is about 2806.0409833073. The cubic root of 7873866 is about 198.9433101991.

The spelling of 7873866 in words is "seven million, eight hundred seventy-three thousand, eight hundred sixty-six".