8478728 has 16 divisors (see below), whose sum is σ = 16198380. Its totient is φ = 4159168.

The previous prime is 8478727. The next prime is 8478737. The reversal of 8478728 is 8278748.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7628644 + 850084 = 2762^2 + 922^2 .

It is not an unprimeable number, because it can be changed into a prime (8478727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9575 + ... + 10422.

Almost surely, 2^8478728 is an apocalyptic number.

It is an amenable number.

8478728 is a deficient number, since it is larger than the sum of its proper divisors (7719652).

8478728 is a wasteful number, since it uses less digits than its factorization.

8478728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20056 (or 20052 counting only the distinct ones).

The product of its digits is 200704, while the sum is 44.

The square root of 8478728 is about 2911.8255442248. The cubic root of 8478728 is about 203.9123678464.

The spelling of 8478728 in words is "eight million, four hundred seventy-eight thousand, seven hundred twenty-eight".