406436 has 24 divisors (see below), whose sum is σ = 776160. Its totient is φ = 185472.

The previous prime is 406423. The next prime is 406447. The reversal of 406436 is 634604.

406436 = T₅₁ + T₅₂ + ... + T₁₃₆.

It is an Ulam number.

It is an unprimeable number.

406436 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2855 + ... + 2993.

It is an arithmetic number, because the mean of its divisors is an integer number (32340).

2⁴⁰⁶⁴³⁶ is an apocalyptic number.

It is an amenable number.

406436 is a deficient number, since it is larger than the sum of its proper divisors (369724).

406436 is a wasteful number, since it uses less digits than its factorization.

406436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203 (or 201 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 406436 is about 637.5233329063. The cubic root of 406436 is about 74.0737030475.

The spelling of 406436 in words is "four hundred six thousand, four hundred thirty-six".