406863 has 10 divisors (see below), whose sum is σ = 607904. Its totient is φ = 271188.

The previous prime is 406859. The next prime is 406873. The reversal of 406863 is 368604.

It is not a de Polignac number, because 406863 - 2² = 406859 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406873) 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 9 ways as a sum of consecutive naturals, for example, 2431 + ... + 2592.

2⁴⁰⁶⁸⁶³ is an apocalyptic number.

406863 is a deficient number, since it is larger than the sum of its proper divisors (201041).

406863 is an equidigital number, since it uses as much as digits as its factorization.

406863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5035 (or 5026 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 406863 is about 637.8581346977. The cubic root of 406863 is about 74.0996344784.

It can be divided in two parts, 40 and 6863, that added together give a triangular number (6903 = T₁₁₇).

The spelling of 406863 in words is "four hundred six thousand, eight hundred sixty-three".