401804 has 12 divisors (see below), whose sum is σ = 757344. Its totient is φ = 185424.

The previous prime is 401773. The next prime is 401809. The reversal of 401804 is 408104.

It is a happy number.

It is a super-2 number, since 2×401804² = 322892908832, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3812 + ... + 3915.

It is an arithmetic number, because the mean of its divisors is an integer number (63112).

2⁴⁰¹⁸⁰⁴ is an apocalyptic number.

It is an amenable number.

401804 is a deficient number, since it is larger than the sum of its proper divisors (355540).

401804 is a wasteful number, since it uses less digits than its factorization.

401804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7744 (or 7742 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 401804 is about 633.8801148482. The cubic root of 401804 is about 73.7912304168.

Adding to 401804 its reverse (408104), we get a palindrome (809908).

The spelling of 401804 in words is "four hundred one thousand, eight hundred four".