406538 has 16 divisors (see below), whose sum is σ = 705024. Its totient is φ = 173760.

The previous prime is 406531. The next prime is 406547. The reversal of 406538 is 835604.

It is not an unprimeable number, because it can be changed into a prime (406531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170 + ... + 917.

It is an arithmetic number, because the mean of its divisors is an integer number (44064).

2⁴⁰⁶⁵³⁸ is an apocalyptic number.

406538 is a deficient number, since it is larger than the sum of its proper divisors (298486).

406538 is a wasteful number, since it uses less digits than its factorization.

406538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1117.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 406538 is about 637.6033249600. The cubic root of 406538 is about 74.0798990913.

The spelling of 406538 in words is "four hundred six thousand, five hundred thirty-eight".