8291428 has 12 divisors (see below), whose sum is σ = 14535612. Its totient is φ = 4138400.

The previous prime is 8291407. The next prime is 8291443. The reversal of 8291428 is 8241928.

It can be written as a sum of positive squares in 2 ways, for example, as 4418404 + 3873024 = 2102^2 + 1968^2 .

It is a junction number, because it is equal to n+sod(n) for n = 8291393 and 8291402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1326 + ... + 4282.

It is an arithmetic number, because the mean of its divisors is an integer number (1211301).

Almost surely, 2^8291428 is an apocalyptic number.

It is an amenable number.

8291428 is a deficient number, since it is larger than the sum of its proper divisors (6244184).

8291428 is a wasteful number, since it uses less digits than its factorization.

8291428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3662 (or 3660 counting only the distinct ones).

The product of its digits is 9216, while the sum is 34.

The square root of 8291428 is about 2879.4839815495. The cubic root of 8291428 is about 202.3996596827.

The spelling of 8291428 in words is "eight million, two hundred ninety-one thousand, four hundred twenty-eight".