8140638 has 24 divisors (see below), whose sum is σ = 17897544. Its totient is φ = 2466640.

The previous prime is 8140609. The next prime is 8140651. The reversal of 8140638 is 8360418.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4881 + ... + 6332.

It is an arithmetic number, because the mean of its divisors is an integer number (745731).

Almost surely, 2^8140638 is an apocalyptic number.

8140638 is an abundant number, since it is smaller than the sum of its proper divisors (9756906).

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

8140638 is a wasteful number, since it uses less digits than its factorization.

8140638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11240 (or 11229 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 8140638 is about 2853.1803307888. The cubic root of 8140638 is about 201.1651819064.

It can be divided in two parts, 8140 and 638, that added together give a palindrome (8778).

The spelling of 8140638 in words is "eight million, one hundred forty thousand, six hundred thirty-eight".