387728 has 20 divisors (see below), whose sum is σ = 819888. Its totient is φ = 176160.

The previous prime is 387727. The next prime is 387743. The reversal of 387728 is 827783.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (387721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 926 + ... + 1277.

2³⁸⁷⁷²⁸ is an apocalyptic number.

It is an amenable number.

387728 is an abundant number, since it is smaller than the sum of its proper divisors (432160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

387728 is a wasteful number, since it uses less digits than its factorization.

387728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2222 (or 2216 counting only the distinct ones).

The product of its digits is 18816, while the sum is 35.

The square root of 387728 is about 622.6780869759. The cubic root of 387728 is about 72.9192827724.

The spelling of 387728 in words is "three hundred eighty-seven thousand, seven hundred twenty-eight".