7886538 has 96 divisors (see below), whose sum is σ = 20684160. Its totient is φ = 2217600.

The previous prime is 7886533. The next prime is 7886591. The reversal of 7886538 is 8356887.

It is a junction number, because it is equal to n+sod(n) for n = 7886493 and 7886502.

It is not an unprimeable number, because it can be changed into a prime (7886533) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 111043 + ... + 111113.

It is an arithmetic number, because the mean of its divisors is an integer number (215460).

Almost surely, 2^7886538 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7886538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10342080).

7886538 is an abundant number, since it is smaller than the sum of its proper divisors (12797622).

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

7886538 is a wasteful number, since it uses less digits than its factorization.

7886538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121 (or 104 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 7886538 is about 2808.2980611039. The cubic root of 7886538 is about 199.0499777674.

The spelling of 7886538 in words is "seven million, eight hundred eighty-six thousand, five hundred thirty-eight".