8270428 has 12 divisors (see below), whose sum is σ = 14940352. Its totient is φ = 4001760.

The previous prime is 8270419. The next prime is 8270429. The reversal of 8270428 is 8240728.

8270428 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a self number, because there is not a number n which added to its sum of digits gives 8270428.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8270429) 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 3 ways as a sum of consecutive naturals, for example, 33225 + ... + 33472.

Almost surely, 2^8270428 is an apocalyptic number.

It is an amenable number.

8270428 is a deficient number, since it is larger than the sum of its proper divisors (6669924).

8270428 is a wasteful number, since it uses less digits than its factorization.

8270428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66732 (or 66730 counting only the distinct ones).

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

The square root of 8270428 is about 2875.8351830381. The cubic root of 8270428 is about 202.2286402360.

The spelling of 8270428 in words is "eight million, two hundred seventy thousand, four hundred twenty-eight".