406813 has 8 divisors (see below), whose sum is σ = 458496. Its totient is φ = 357600.

The previous prime is 406811. The next prime is 406817. The reversal of 406813 is 318604.

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

It is a cyclic number.

It is not a de Polignac number, because 406813 - 2¹ = 406811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256 + ... + 937.

It is an arithmetic number, because the mean of its divisors is an integer number (57312).

2⁴⁰⁶⁸¹³ is an apocalyptic number.

It is an amenable number.

406813 is a deficient number, since it is larger than the sum of its proper divisors (51683).

406813 is a wasteful number, since it uses less digits than its factorization.

406813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1235.

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

The square root of 406813 is about 637.8189398254. The cubic root of 406813 is about 74.0965989492.

Subtracting from 406813 its reverse (318604), we obtain a square (88209 = 297²).

It can be divided in two parts, 406 and 813, that multiplied together give a triangular number (330078 = T₈₁₂).

The spelling of 406813 in words is "four hundred six thousand, eight hundred thirteen".