404978 has 8 divisors (see below), whose sum is σ = 694272. Its totient is φ = 173556.

The previous prime is 404977. The next prime is 404981. The reversal of 404978 is 879404.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404977) by changing a digit.

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, 14450 + ... + 14477.

It is an arithmetic number, because the mean of its divisors is an integer number (86784).

2⁴⁰⁴⁹⁷⁸ is an apocalyptic number.

404978 is a deficient number, since it is larger than the sum of its proper divisors (289294).

404978 is a wasteful number, since it uses less digits than its factorization.

404978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28936.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 404978 is about 636.3788180007. The cubic root of 404978 is about 73.9850225349.

The spelling of 404978 in words is "four hundred four thousand, nine hundred seventy-eight".