387128 has 32 divisors (see below), whose sum is σ = 860160. Its totient is φ = 159840.

The previous prime is 387109. The next prime is 387137. The reversal of 387128 is 821783.

It is a self number, because there is not a number n which added to its sum of digits gives 387128.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1625 + ... + 1847.

It is an arithmetic number, because the mean of its divisors is an integer number (26880).

2³⁸⁷¹²⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 387128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (430080).

387128 is an abundant number, since it is smaller than the sum of its proper divisors (473032).

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

387128 is a wasteful number, since it uses less digits than its factorization.

387128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267 (or 263 counting only the distinct ones).

The product of its digits is 2688, while the sum is 29.

The square root of 387128 is about 622.1961105632. The cubic root of 387128 is about 72.8816497261.

It can be divided in two parts, 387 and 128, that added together give a palindrome (515).

The spelling of 387128 in words is "three hundred eighty-seven thousand, one hundred twenty-eight".