8947428 has 48 divisors (see below), whose sum is σ = 24689280. Its totient is φ = 2467584.

The previous prime is 8947417. The next prime is 8947441. The reversal of 8947428 is 8247498.

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

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 8947428.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 600 + ... + 4272.

It is an arithmetic number, because the mean of its divisors is an integer number (514360).

Almost surely, 2^8947428 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 8947428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12344640).

8947428 is an abundant number, since it is smaller than the sum of its proper divisors (15741852).

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

8947428 is a wasteful number, since it uses less digits than its factorization.

8947428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3716 (or 3714 counting only the distinct ones).

The product of its digits is 129024, while the sum is 42.

The square root of 8947428 is about 2991.2251670511. The cubic root of 8947428 is about 207.6025756936.

The spelling of 8947428 in words is "eight million, nine hundred forty-seven thousand, four hundred twenty-eight".