381828 has 24 divisors (see below), whose sum is σ = 911232. Its totient is φ = 124384.

The previous prime is 381817. The next prime is 381841. The reversal of 381828 is 828183.

381828 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 381795 and 381804.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226 + ... + 902.

It is an arithmetic number, because the mean of its divisors is an integer number (37968).

2³⁸¹⁸²⁸ is an apocalyptic number.

It is an amenable number.

381828 is an abundant number, since it is smaller than the sum of its proper divisors (529404).

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

381828 is a wasteful number, since it uses less digits than its factorization.

381828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731 (or 729 counting only the distinct ones).

The product of its digits is 3072, while the sum is 30.

The square root of 381828 is about 617.9223252157. The cubic root of 381828 is about 72.5475233405.

The spelling of 381828 in words is "three hundred eighty-one thousand, eight hundred twenty-eight".