381850 has 24 divisors (see below), whose sum is σ = 812448. Its totient is φ = 130800.

The previous prime is 381841. The next prime is 381853. The reversal of 381850 is 58183.

381850 = 103² + 104² + ... + 130².

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (381853) by changing a digit.

381850 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 11 ways as a sum of consecutive naturals, for example, 196 + ... + 895.

It is an arithmetic number, because the mean of its divisors is an integer number (33852).

2³⁸¹⁸⁵⁰ is an apocalyptic number.

381850 is an abundant number, since it is smaller than the sum of its proper divisors (430598).

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

381850 is a wasteful number, since it uses less digits than its factorization.

381850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110 (or 1105 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 381850 is about 617.9401265495. The cubic root of 381850 is about 72.5489166510.

The spelling of 381850 in words is "three hundred eighty-one thousand, eight hundred fifty".