387385 has 4 divisors (see below), whose sum is σ = 464868. Its totient is φ = 309904.

The previous prime is 387371. The next prime is 387397. The reversal of 387385 is 583783.

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 249001 + 138384 = 499^2 + 372^2 .

It is a cyclic number.

It is not a de Polignac number, because 387385 - 2¹⁷ = 256313 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 387385.

It is a congruent number.

It is an unprimeable 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 3 ways as a sum of consecutive naturals, for example, 38734 + ... + 38743.

It is an arithmetic number, because the mean of its divisors is an integer number (116217).

2³⁸⁷³⁸⁵ is an apocalyptic number.

It is an amenable number.

387385 is a deficient number, since it is larger than the sum of its proper divisors (77483).

387385 is an equidigital number, since it uses as much as digits as its factorization.

387385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77482.

The product of its digits is 20160, while the sum is 34.

The square root of 387385 is about 622.4026028223. The cubic root of 387385 is about 72.8977739715.

The spelling of 387385 in words is "three hundred eighty-seven thousand, three hundred eighty-five".