8261838 has 40 divisors (see below), whose sum is σ = 19941768. Its totient is φ = 2541456.

The previous prime is 8261833. The next prime is 8261843. The reversal of 8261838 is 8381628.

8261838 is a `hidden beast` number, since 8 + 2 + 618 + 38 = 666.

It is an interprime number because it is at equal distance from previous prime (8261833) and next prime (8261843).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8261833) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 145 + ... + 4067.

Almost surely, 2^8261838 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8261838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9970884).

8261838 is an abundant number, since it is smaller than the sum of its proper divisors (11679930).

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

8261838 is a wasteful number, since it uses less digits than its factorization.

8261838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3950 (or 3941 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 8261838 is about 2874.3413158496. The cubic root of 8261838 is about 202.1586017088.

The spelling of 8261838 in words is "eight million, two hundred sixty-one thousand, eight hundred thirty-eight".