386428 has 24 divisors (see below), whose sum is σ = 795872. Its totient is φ = 160704.

The previous prime is 386413. The next prime is 386429. The reversal of 386428 is 824683.

It is a happy number.

386428 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 386428.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (386429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 850 + ... + 1222.

2³⁸⁶⁴²⁸ 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 386428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (397936).

386428 is an abundant number, since it is smaller than the sum of its proper divisors (409444).

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

386428 is a wasteful number, since it uses less digits than its factorization.

386428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421 (or 419 counting only the distinct ones).

The product of its digits is 9216, while the sum is 31.

The square root of 386428 is about 621.6333324396. The cubic root of 386428 is about 72.8376953275.

It can be divided in two parts, 38642 and 8, that multiplied together give a square (309136 = 556²).

The spelling of 386428 in words is "three hundred eighty-six thousand, four hundred twenty-eight".