408436 has 24 divisors (see below), whose sum is σ = 846720. Its totient is φ = 168672.

The previous prime is 408433. The next prime is 408437. The reversal of 408436 is 634804.

It is a self number, because there is not a number n which added to its sum of digits gives 408436.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 561 + ... + 1063.

It is an arithmetic number, because the mean of its divisors is an integer number (35280).

2⁴⁰⁸⁴³⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 408436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (423360).

408436 is an abundant number, since it is smaller than the sum of its proper divisors (438284).

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

408436 is a wasteful number, since it uses less digits than its factorization.

408436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543 (or 541 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 408436 is about 639.0899780156. The cubic root of 408436 is about 74.1950055124.

The spelling of 408436 in words is "four hundred eight thousand, four hundred thirty-six".