8428005 has 48 divisors (see below), whose sum is σ = 16174080. Its totient is φ = 4038144.

The previous prime is 8428003. The next prime is 8428031. The reversal of 8428005 is 5008248.

It is not a de Polignac number, because 8428005 - 2¹ = 8428003 is a prime.

It is a Curzon number.

8428005 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 8428005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8428003) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17356 + ... + 17834.

It is an arithmetic number, because the mean of its divisors is an integer number (336960).

Almost surely, 2^8428005 is an apocalyptic number.

8428005 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

8428005 is a deficient number, since it is larger than the sum of its proper divisors (7746075).

8428005 is a wasteful number, since it uses less digits than its factorization.

8428005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530 (or 527 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 8428005 is about 2903.1026506136. The cubic root of 8428005 is about 203.5049269655.

The spelling of 8428005 in words is "eight million, four hundred twenty-eight thousand, five".