406918 has 4 divisors (see below), whose sum is σ = 610380. Its totient is φ = 203458.

The previous prime is 406907. The next prime is 406951. The reversal of 406918 is 819604.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101728 + ... + 101731.

It is an arithmetic number, because the mean of its divisors is an integer number (152595).

2⁴⁰⁶⁹¹⁸ is an apocalyptic number.

406918 is a deficient number, since it is larger than the sum of its proper divisors (203462).

406918 is a wasteful number, since it uses less digits than its factorization.

406918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203461.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 406918 is about 637.9012462756. The cubic root of 406918 is about 74.1029732732.

Subtracting 406918 from its reverse (819604), we obtain a triangular number (412686 = T₉₀₈).

The spelling of 406918 in words is "four hundred six thousand, nine hundred eighteen".