800008020 has 72 divisors (see below), whose sum is σ = 2773365504. Its totient is φ = 182858688.

The previous prime is 800007997. The next prime is 800008051. The reversal of 800008020 is 20800008.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 800007984 and 800008002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 316204 + ... + 318723.

Almost surely, 2^800008020 is an apocalyptic number.

It is an amenable number.

800008020 is an abundant number, since it is smaller than the sum of its proper divisors (1973357484).

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

800008020 is a wasteful number, since it uses less digits than its factorization.

800008020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634949 (or 634944 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 800008020 is about 28284.4130220162. The cubic root of 800008020 is about 928.3208688407.

Adding to 800008020 its reverse (20800008), we get a palindrome (820808028).

The spelling of 800008020 in words is "eight hundred million, eight thousand, twenty".