387889 has 4 divisors (see below), whose sum is σ = 410724. Its totient is φ = 365056.

The previous prime is 387857. The next prime is 387911. The reversal of 387889 is 988783.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 360000 + 27889 = 600^2 + 167^2 .

It is a cyclic number.

It is not a de Polignac number, because 387889 - 2⁵ = 387857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (387839) 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 3 ways as a sum of consecutive naturals, for example, 11392 + ... + 11425.

It is an arithmetic number, because the mean of its divisors is an integer number (102681).

2³⁸⁷⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

387889 is a deficient number, since it is larger than the sum of its proper divisors (22835).

387889 is a wasteful number, since it uses less digits than its factorization.

387889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22834.

The product of its digits is 96768, while the sum is 43.

The square root of 387889 is about 622.8073538423. The cubic root of 387889 is about 72.9293743657.

The spelling of 387889 in words is "three hundred eighty-seven thousand, eight hundred eighty-nine".