8020638 has 24 divisors (see below), whose sum is σ = 17849208. Its totient is φ = 2601072.

The previous prime is 8020631. The next prime is 8020643. The reversal of 8020638 is 8360208.

8020638 is a `hidden beast` number, since 8 + 0 + 20 + 638 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8020631) 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 11 ways as a sum of consecutive naturals, for example, 5356 + ... + 6687.

It is an arithmetic number, because the mean of its divisors is an integer number (743717).

Almost surely, 2^8020638 is an apocalyptic number.

8020638 is an abundant number, since it is smaller than the sum of its proper divisors (9828570).

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

8020638 is a wasteful number, since it uses less digits than its factorization.

8020638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12088 (or 12085 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 8020638 is about 2832.0730922771. The cubic root of 8020638 is about 200.1718356536.

The spelling of 8020638 in words is "eight million, twenty thousand, six hundred thirty-eight".