387928 has 8 divisors (see below), whose sum is σ = 727380. Its totient is φ = 193960.

The previous prime is 387917. The next prime is 387953. The reversal of 387928 is 829783.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

387928 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 as a sum of consecutive naturals, namely, 24238 + ... + 24253.

2³⁸⁷⁹²⁸ is an apocalyptic number.

It is an amenable number.

387928 is a deficient number, since it is larger than the sum of its proper divisors (339452).

387928 is a wasteful number, since it uses less digits than its factorization.

387928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48497 (or 48493 counting only the distinct ones).

The product of its digits is 24192, while the sum is 37.

The square root of 387928 is about 622.8386628975. The cubic root of 387928 is about 72.9318184930.

The spelling of 387928 in words is "three hundred eighty-seven thousand, nine hundred twenty-eight".