381789 has 12 divisors (see below), whose sum is σ = 561600. Its totient is φ = 249864.

The previous prime is 381761. The next prime is 381791. The reversal of 381789 is 987183.

It is not a de Polignac number, because 381789 - 2⁵ = 381757 is a prime.

It is an Ulam number.

It is a Curzon number.

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 381789.

It is not an unprimeable number, because it can be changed into a prime (381739) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 172 + ... + 890.

It is an arithmetic number, because the mean of its divisors is an integer number (46800).

2³⁸¹⁷⁸⁹ is an apocalyptic number.

It is an amenable number.

381789 is a deficient number, since it is larger than the sum of its proper divisors (179811).

381789 is a wasteful number, since it uses less digits than its factorization.

381789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784 (or 781 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 381789 is about 617.8907670454. The cubic root of 381789 is about 72.5450532495.

The spelling of 381789 in words is "three hundred eighty-one thousand, seven hundred eighty-nine".