403844 has 12 divisors (see below), whose sum is σ = 807744. Its totient is φ = 173064.

The previous prime is 403831. The next prime is 403849. The reversal of 403844 is 448304.

403844 is an admirable number.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (403849) by changing a digit.

403844 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 7184 + ... + 7239.

It is an arithmetic number, because the mean of its divisors is an integer number (67312).

2⁴⁰³⁸⁴⁴ is an apocalyptic number.

It is an amenable number.

403844 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

403844 is a wasteful number, since it uses less digits than its factorization.

403844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14434 (or 14432 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 403844 is about 635.4872146629. The cubic root of 403844 is about 73.9159015394.

The spelling of 403844 in words is "four hundred three thousand, eight hundred forty-four".