381826 has 4 divisors (see below), whose sum is σ = 572742. Its totient is φ = 190912.

The previous prime is 381817. The next prime is 381841. The reversal of 381826 is 628183.

381826 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 342225 + 39601 = 585^2 + 199^2 .

It is a junction number, because it is equal to n+sod(n) for n = 381794 and 381803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95455 + ... + 95458.

2³⁸¹⁸²⁶ is an apocalyptic number.

381826 is a deficient number, since it is larger than the sum of its proper divisors (190916).

381826 is a wasteful number, since it uses less digits than its factorization.

381826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190915.

The product of its digits is 2304, while the sum is 28.

The square root of 381826 is about 617.9207068872. The cubic root of 381826 is about 72.5473966733.

It can be divided in two parts, 3818 and 26, that added together give a square (3844 = 62²).

The spelling of 381826 in words is "three hundred eighty-one thousand, eight hundred twenty-six".