406023 has 8 divisors (see below), whose sum is σ = 554736. Its totient is φ = 264000.

The previous prime is 406013. The next prime is 406027. The reversal of 406023 is 320604.

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

It is not a de Polignac number, because 406023 - 2⁵ = 405991 is a prime.

It is a Smith number, since the sum of its digits (15) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 405993 and 406011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406027) 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, 1528 + ... + 1773.

It is an arithmetic number, because the mean of its divisors is an integer number (69342).

2⁴⁰⁶⁰²³ is an apocalyptic number.

406023 is a deficient number, since it is larger than the sum of its proper divisors (148713).

406023 is a wasteful number, since it uses less digits than its factorization.

406023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3345.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 406023 is about 637.1993408659. The cubic root of 406023 is about 74.0486045430.

Adding to 406023 its reverse (320604), we get a palindrome (726627).

The spelling of 406023 in words is "four hundred six thousand, twenty-three".