408138 has 8 divisors (see below), whose sum is σ = 816288. Its totient is φ = 136044.

The previous prime is 408137. The next prime is 408169. The reversal of 408138 is 831804.

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

408138 is an admirable number.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (408131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34006 + ... + 34017.

It is an arithmetic number, because the mean of its divisors is an integer number (102036).

2⁴⁰⁸¹³⁸ is an apocalyptic number.

408138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

408138 is a wasteful number, since it uses less digits than its factorization.

408138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68028.

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 408138 is about 638.8567914643. The cubic root of 408138 is about 74.1769565883.

The spelling of 408138 in words is "four hundred eight thousand, one hundred thirty-eight".