381756 has 24 divisors (see below), whose sum is σ = 922320. Its totient is φ = 122752.

The previous prime is 381749. The next prime is 381757. The reversal of 381756 is 657183.

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 381756.

It is not an unprimeable number, because it can be changed into a prime (381757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201 + ... + 896.

It is an arithmetic number, because the mean of its divisors is an integer number (38430).

2³⁸¹⁷⁵⁶ is an apocalyptic number.

It is an amenable number.

381756 is an abundant number, since it is smaller than the sum of its proper divisors (540564).

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

381756 is a wasteful number, since it uses less digits than its factorization.

381756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1133 (or 1131 counting only the distinct ones).

The product of its digits is 5040, while the sum is 30.

The square root of 381756 is about 617.8640627193. The cubic root of 381756 is about 72.5429630411.

The spelling of 381756 in words is "three hundred eighty-one thousand, seven hundred fifty-six".