403812 has 24 divisors (see below), whose sum is σ = 1047200. Its totient is φ = 134568.

The previous prime is 403787. The next prime is 403817. The reversal of 403812 is 218304.

It is a happy number.

403812 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (403817) by changing a digit.

403812 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 in 7 ways as a sum of consecutive naturals, for example, 1762 + ... + 1977.

2⁴⁰³⁸¹² is an apocalyptic number.

It is an amenable number.

403812 is an abundant number, since it is smaller than the sum of its proper divisors (643388).

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

403812 is a wasteful number, since it uses less digits than its factorization.

403812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3752 (or 3744 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 403812 is about 635.4620366316. The cubic root of 403812 is about 73.9139491590.

The spelling of 403812 in words is "four hundred three thousand, eight hundred twelve".