40838638 has 8 divisors (see below), whose sum is σ = 64482120. Its totient is φ = 19344600.

The previous prime is 40838627. The next prime is 40838653. The reversal of 40838638 is 83683804.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 40838638.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 537313 + ... + 537388.

It is an arithmetic number, because the mean of its divisors is an integer number (8060265).

Almost surely, 2^40838638 is an apocalyptic number.

40838638 is a deficient number, since it is larger than the sum of its proper divisors (23643482).

40838638 is a wasteful number, since it uses less digits than its factorization.

40838638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074722.

The product of its (nonzero) digits is 110592, while the sum is 40.

The square root of 40838638 is about 6390.5115601179. The cubic root of 40838638 is about 344.3687624295.

It can be divided in two parts, 4083 and 8638, that added together give a palindrome (12721).

The spelling of 40838638 in words is "forty million, eight hundred thirty-eight thousand, six hundred thirty-eight".