8569428 has 72 divisors (see below), whose sum is σ = 24343872. Its totient is φ = 2297856.

The previous prime is 8569417. The next prime is 8569433. The reversal of 8569428 is 8249658.

8569428 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 8569428.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24100 + ... + 24452.

Almost surely, 2^8569428 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 8569428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12171936).

8569428 is an abundant number, since it is smaller than the sum of its proper divisors (15774444).

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

8569428 is a wasteful number, since it uses less digits than its factorization.

8569428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401 (or 382 counting only the distinct ones).

The product of its digits is 138240, while the sum is 42.

The square root of 8569428 is about 2927.3585362917. The cubic root of 8569428 is about 204.6368983903.

The spelling of 8569428 in words is "eight million, five hundred sixty-nine thousand, four hundred twenty-eight".