8638472 has 8 divisors (see below), whose sum is σ = 16197150. Its totient is φ = 4319232.

The previous prime is 8638471. The next prime is 8638477. The reversal of 8638472 is 2748368.

It can be written as a sum of positive squares in only one way, i.e., 8099716 + 538756 = 2846^2 + 734^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (8638471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 539897 + ... + 539912.

Almost surely, 2^8638472 is an apocalyptic number.

It is an amenable number.

8638472 is a deficient number, since it is larger than the sum of its proper divisors (7558678).

8638472 is a wasteful number, since it uses less digits than its factorization.

8638472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1079815 (or 1079811 counting only the distinct ones).

The product of its digits is 64512, while the sum is 38.

The square root of 8638472 is about 2939.1277617688. The cubic root of 8638472 is about 205.1850163915.

The spelling of 8638472 in words is "eight million, six hundred thirty-eight thousand, four hundred seventy-two".