387945 has 24 divisors (see below), whose sum is σ = 693576. Its totient is φ = 200448.

The previous prime is 387917. The next prime is 387953. The reversal of 387945 is 549783.

It can be written as a sum of positive squares in 4 ways, for example, as 56169 + 331776 = 237^2 + 576^2 .

It is not a de Polignac number, because 387945 - 2⁵ = 387913 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1549 + ... + 1781.

It is an arithmetic number, because the mean of its divisors is an integer number (28899).

2³⁸⁷⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

387945 is a deficient number, since it is larger than the sum of its proper divisors (305631).

387945 is a wasteful number, since it uses less digits than its factorization.

387945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281 (or 278 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 387945 is about 622.8523099419. The cubic root of 387945 is about 72.9328838306.

The spelling of 387945 in words is "three hundred eighty-seven thousand, nine hundred forty-five".