403820 has 24 divisors (see below), whose sum is σ = 864528. Its totient is φ = 158400.

The previous prime is 403817. The next prime is 403829. The reversal of 403820 is 28304.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 403820.

It is not an unprimeable number, because it can be changed into a prime (403829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1055 + ... + 1385.

It is an arithmetic number, because the mean of its divisors is an integer number (36022).

2⁴⁰³⁸²⁰ is an apocalyptic number.

It is an amenable number.

403820 is an abundant number, since it is smaller than the sum of its proper divisors (460708).

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

403820 is a wasteful number, since it uses less digits than its factorization.

403820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401 (or 399 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 403820 is about 635.4683312330. The cubic root of 403820 is about 73.9144372637.

The spelling of 403820 in words is "four hundred three thousand, eight hundred twenty".