8100644 has 12 divisors (see below), whose sum is σ = 14218764. Its totient is φ = 4038144.

The previous prime is 8100643. The next prime is 8100661. The reversal of 8100644 is 4460018.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1183744 + 6916900 = 1088^2 + 2630^2 .

It is not an unprimeable number, because it can be changed into a prime (8100643) 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 3 ways as a sum of consecutive naturals, for example, 1457 + ... + 4280.

It is an arithmetic number, because the mean of its divisors is an integer number (1184897).

Almost surely, 2^8100644 is an apocalyptic number.

It is an amenable number.

8100644 is a deficient number, since it is larger than the sum of its proper divisors (6118120).

8100644 is a wasteful number, since it uses less digits than its factorization.

8100644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6094 (or 6092 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 8100644 is about 2846.1630311702. The cubic root of 8100644 is about 200.8352072888.

The spelling of 8100644 in words is "eight million, one hundred thousand, six hundred forty-four".