406418 has 4 divisors (see below), whose sum is σ = 609630. Its totient is φ = 203208.

The previous prime is 406403. The next prime is 406423. The reversal of 406418 is 814604.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 267289 + 139129 = 517^2 + 373^2 .

It is a junction number, because it is equal to n+sod(n) for n = 406393 and 406402.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 406418.

It is an unprimeable number.

406418 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 as a sum of consecutive naturals, namely, 101603 + ... + 101606.

2⁴⁰⁶⁴¹⁸ is an apocalyptic number.

406418 is a deficient number, since it is larger than the sum of its proper divisors (203212).

406418 is a wasteful number, since it uses less digits than its factorization.

406418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203211.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 406418 is about 637.5092156197. The cubic root of 406418 is about 74.0726095204.

The spelling of 406418 in words is "four hundred six thousand, four hundred eighteen".