7821008804 has 24 divisors (see below), whose sum is σ = 15643911360. Its totient is φ = 3351455136.

The previous prime is 7821008801. The next prime is 7821008809. The reversal of 7821008804 is 4088001287.

It is a happy number.

It is a super-2 number, since 2×7821008804² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7821008801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 391982 + ... + 411450.

It is an arithmetic number, because the mean of its divisors is an integer number (651829640).

Almost surely, 2^7821008804 is an apocalyptic number.

It is an amenable number.

7821008804 is an abundant number, since it is smaller than the sum of its proper divisors (7822902556).

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

7821008804 is a wasteful number, since it uses less digits than its factorization.

7821008804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33827 (or 33825 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 38.

The square root of 7821008804 is about 88436.4676137621. The cubic root of 7821008804 is about 1984.9714207637.

The spelling of 7821008804 in words is "seven billion, eight hundred twenty-one million, eight thousand, eight hundred four".