8389428 has 12 divisors (see below), whose sum is σ = 19575360. Its totient is φ = 2796472.

The previous prime is 8389373. The next prime is 8389441. The reversal of 8389428 is 8249838.

It is a happy number.

8389428 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

It is a d-powerful number, because it can be written as 8 + 3³ + 8 + 9 + 4⁴ + 2²³ + 8³ .

It is a self number, because there is not a number n which added to its sum of digits gives 8389428.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 349548 + ... + 349571.

It is an arithmetic number, because the mean of its divisors is an integer number (1631280).

Almost surely, 2^8389428 is an apocalyptic number.

It is an amenable number.

8389428 is an abundant number, since it is smaller than the sum of its proper divisors (11185932).

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

8389428 is a wasteful number, since it uses less digits than its factorization.

8389428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699126 (or 699124 counting only the distinct ones).

The product of its digits is 110592, while the sum is 42.

The square root of 8389428 is about 2896.4509317439. The cubic root of 8389428 is about 203.1939550664.

The spelling of 8389428 in words is "eight million, three hundred eighty-nine thousand, four hundred twenty-eight".