406138 has 8 divisors (see below), whose sum is σ = 619380. Its totient is φ = 199680.

The previous prime is 406123. The next prime is 406169. The reversal of 406138 is 831604.

406138 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 356409 + 49729 = 597^2 + 223^2 .

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

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, 1543 + ... + 1786.

2⁴⁰⁶¹³⁸ is an apocalyptic number.

406138 is a deficient number, since it is larger than the sum of its proper divisors (213242).

406138 is a wasteful number, since it uses less digits than its factorization.

406138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3392.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 406138 is about 637.2895731141. The cubic root of 406138 is about 74.0555949398.

The spelling of 406138 in words is "four hundred six thousand, one hundred thirty-eight".