8663872 has 56 divisors (see below), whose sum is σ = 19970496. Its totient is φ = 3652608.

The previous prime is 8663869. The next prime is 8663899. The reversal of 8663872 is 2783668.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 37068 + ... + 37300.

It is an arithmetic number, because the mean of its divisors is an integer number (356616).

Almost surely, 2^8663872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8663872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9985248).

8663872 is an abundant number, since it is smaller than the sum of its proper divisors (11306624).

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

8663872 is a wasteful number, since it uses less digits than its factorization.

8663872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335 (or 325 counting only the distinct ones).

The product of its digits is 96768, while the sum is 40.

The square root of 8663872 is about 2943.4455999729. The cubic root of 8663872 is about 205.3859238243.

The spelling of 8663872 in words is "eight million, six hundred sixty-three thousand, eight hundred seventy-two".