8820600644 has 12 divisors (see below), whose sum is σ = 15853241964. Its totient is φ = 4291102944.

The previous prime is 8820600643. The next prime is 8820600661. The reversal of 8820600644 is 4460060288.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5996953600 + 2823647044 = 77440^2 + 53138^2 .

It is a junction number, because it is equal to n+sod(n) for n = 8820600598 and 8820600607.

It is not an unprimeable number, because it can be changed into a prime (8820600643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29799179 + ... + 29799474.

It is an arithmetic number, because the mean of its divisors is an integer number (1321103497).

Almost surely, 2^8820600644 is an apocalyptic number.

It is an amenable number.

8820600644 is a deficient number, since it is larger than the sum of its proper divisors (7032641320).

8820600644 is a wasteful number, since it uses less digits than its factorization.

8820600644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59598694 (or 59598692 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 38.

The square root of 8820600644 is about 93918.0528120127. The cubic root of 8820600644 is about 2066.1700083791.

The spelling of 8820600644 in words is "eight billion, eight hundred twenty million, six hundred thousand, six hundred forty-four".