8388620820 has 60 divisors (see below), whose sum is σ = 26315419284. Its totient is φ = 2236965120.

The previous prime is 8388620813. The next prime is 8388620827. The reversal of 8388620820 is 280268838.

It is an interprime number because it is at equal distance from previous prime (8388620813) and next prime (8388620827).

It can be written as a sum of positive squares in 2 ways, for example, as 3264065424 + 5124555396 = 57132^2 + 71586^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8388620827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2587461 + ... + 2590700.

Almost surely, 2^8388620820 is an apocalyptic number.

It is an amenable number.

8388620820 is an abundant number, since it is smaller than the sum of its proper divisors (17926798464).

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

8388620820 is a wasteful number, since it uses less digits than its factorization.

8388620820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5178182 (or 5178171 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 45.

The square root of 8388620820 is about 91589.4143446720. The cubic root of 8388620820 is about 2031.8743815978.

The spelling of 8388620820 in words is "eight billion, three hundred eighty-eight million, six hundred twenty thousand, eight hundred twenty".