8228740 has 24 divisors (see below), whose sum is σ = 18610200. Its totient is φ = 3038208.

The previous prime is 8228723. The next prime is 8228747. The reversal of 8228740 is 478228.

It can be written as a sum of positive squares in 4 ways, for example, as 906304 + 7322436 = 952^2 + 2706^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (8228747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15565 + ... + 16084.

It is an arithmetic number, because the mean of its divisors is an integer number (775425).

Almost surely, 2^8228740 is an apocalyptic number.

It is an amenable number.

8228740 is an abundant number, since it is smaller than the sum of its proper divisors (10381460).

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

8228740 is a wasteful number, since it uses less digits than its factorization.

8228740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31671 (or 31669 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 31.

The square root of 8228740 is about 2868.5780449554. The cubic root of 8228740 is about 201.8882825052. Note that the first 3 decimals are identical.

The spelling of 8228740 in words is "eight million, two hundred twenty-eight thousand, seven hundred forty".