8721888 has 48 divisors (see below), whose sum is σ = 26167680. Its totient is φ = 2491776.

The previous prime is 8721883. The next prime is 8721907. The reversal of 8721888 is 8881278.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8721883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5818 + ... + 7161.

It is an arithmetic number, because the mean of its divisors is an integer number (545160).

Almost surely, 2^8721888 is an apocalyptic number.

It is an amenable number.

8721888 is an abundant number, since it is smaller than the sum of its proper divisors (17445792).

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

8721888 is a wasteful number, since it uses less digits than its factorization.

8721888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12999 (or 12991 counting only the distinct ones).

The product of its digits is 57344, while the sum is 42.

The square root of 8721888 is about 2953.2842734827. The cubic root of 8721888 is about 205.8433471428.

The spelling of 8721888 in words is "eight million, seven hundred twenty-one thousand, eight hundred eighty-eight".