406478 has 8 divisors (see below), whose sum is σ = 613872. Its totient is φ = 201856.

The previous prime is 406447. The next prime is 406481. The reversal of 406478 is 874604.

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

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 406478.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 406478.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 275 + ... + 942.

It is an arithmetic number, because the mean of its divisors is an integer number (76734).

2⁴⁰⁶⁴⁷⁸ is an apocalyptic number.

406478 is a deficient number, since it is larger than the sum of its proper divisors (207394).

406478 is a wasteful number, since it uses less digits than its factorization.

406478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1386.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 406478 is about 637.5562720262. The cubic root of 406478 is about 74.0762544852.

The spelling of 406478 in words is "four hundred six thousand, four hundred seventy-eight".