8638972 has 12 divisors (see below), whose sum is σ = 15300936. Its totient is φ = 4267280.

The previous prime is 8638967. The next prime is 8638991. The reversal of 8638972 is 2798368.

It is a congruent number.

It is an unprimeable number.

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, 12679 + ... + 13342.

It is an arithmetic number, because the mean of its divisors is an integer number (1275078).

Almost surely, 2^8638972 is an apocalyptic number.

It is an amenable number.

8638972 is a deficient number, since it is larger than the sum of its proper divisors (6661964).

8638972 is a wasteful number, since it uses less digits than its factorization.

8638972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26108 (or 26106 counting only the distinct ones).

The product of its digits is 145152, while the sum is 43.

The square root of 8638972 is about 2939.2128197870. The cubic root of 8638972 is about 205.1889750596.

The spelling of 8638972 in words is "eight million, six hundred thirty-eight thousand, nine hundred seventy-two".