403842 has 8 divisors (see below), whose sum is σ = 807696. Its totient is φ = 134612.

The previous prime is 403831. The next prime is 403849. The reversal of 403842 is 248304.

It is a happy number.

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

403842 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (403849) 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, 33648 + ... + 33659.

It is an arithmetic number, because the mean of its divisors is an integer number (100962).

2⁴⁰³⁸⁴² is an apocalyptic number.

403842 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.

403842 is a wasteful number, since it uses less digits than its factorization.

403842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67312.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 403842 is about 635.4856410652. The cubic root of 403842 is about 73.9157795186.

The spelling of 403842 in words is "four hundred three thousand, eight hundred forty-two".