381750 has 32 divisors (see below), whose sum is σ = 954720. Its totient is φ = 101600.

The previous prime is 381749. The next prime is 381757. The reversal of 381750 is 57183.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 381750.

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 381750.

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 15 ways as a sum of consecutive naturals, for example, 496 + ... + 1004.

It is an arithmetic number, because the mean of its divisors is an integer number (29835).

2³⁸¹⁷⁵⁰ is an apocalyptic number.

381750 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 381750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (477360).

381750 is an abundant number, since it is smaller than the sum of its proper divisors (572970).

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

381750 is a wasteful number, since it uses less digits than its factorization.

381750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529 (or 519 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 381750 is about 617.8592072633. The cubic root of 381750 is about 72.5425829903.

The spelling of 381750 in words is "three hundred eighty-one thousand, seven hundred fifty".