406678 has 4 divisors (see below), whose sum is σ = 610020. Its totient is φ = 203338.

The previous prime is 406673. The next prime is 406697. The reversal of 406678 is 876604.

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

It is a super-3 number, since 3×406678³ = 201777757892333256, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406673) by changing a digit.

406678 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, 101668 + ... + 101671.

It is an arithmetic number, because the mean of its divisors is an integer number (152505).

2⁴⁰⁶⁶⁷⁸ is an apocalyptic number.

406678 is a deficient number, since it is larger than the sum of its proper divisors (203342).

406678 is a wasteful number, since it uses less digits than its factorization.

406678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203341.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 406678 is about 637.7131016374. The cubic root of 406678 is about 74.0884017779.

The spelling of 406678 in words is "four hundred six thousand, six hundred seventy-eight".