8642020 has 24 divisors (see below), whose sum is σ = 18938304. Its totient is φ = 3306336.

The previous prime is 8642003. The next prime is 8642027. The reversal of 8642020 is 202468.

It is a junction number, because it is equal to n+sod(n) for n = 8641982 and 8642000.

It is not an unprimeable number, because it can be changed into a prime (8642027) 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, 8934 + ... + 9853.

It is an arithmetic number, because the mean of its divisors is an integer number (789096).

Almost surely, 2^8642020 is an apocalyptic number.

It is an amenable number.

8642020 is an abundant number, since it is smaller than the sum of its proper divisors (10296284).

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

8642020 is a wasteful number, since it uses less digits than its factorization.

8642020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18819 (or 18817 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 8642020 is about 2939.7312802363. The cubic root of 8642020 is about 205.2131037968.

Adding to 8642020 its reverse (202468), we get a palindrome (8844488).

The spelling of 8642020 in words is "eight million, six hundred forty-two thousand, twenty".