8447428 has 24 divisors (see below), whose sum is σ = 16279200. Its totient is φ = 3803520.

The previous prime is 8447423. The next prime is 8447429. The reversal of 8447428 is 8247448.

It is not an unprimeable number, because it can be changed into a prime (8447423) 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, 4123 + ... + 5821.

It is an arithmetic number, because the mean of its divisors is an integer number (678300).

Almost surely, 2^8447428 is an apocalyptic number.

It is an amenable number.

8447428 is a deficient number, since it is larger than the sum of its proper divisors (7831772).

8447428 is a wasteful number, since it uses less digits than its factorization.

8447428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1827 (or 1825 counting only the distinct ones).

The product of its digits is 57344, while the sum is 37.

The square root of 8447428 is about 2906.4459396314. The cubic root of 8447428 is about 203.6611380601.

The spelling of 8447428 in words is "eight million, four hundred forty-seven thousand, four hundred twenty-eight".