8641872 has 30 divisors (see below), whose sum is σ = 24185642. Its totient is φ = 2880576.

The previous prime is 8641819. The next prime is 8641873. The reversal of 8641872 is 2781468.

8641872 is a `hidden beast` number, since 8 + 641 + 8 + 7 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 8088336 + 553536 = 2844^2 + 744^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8641873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29863 + ... + 30150.

Almost surely, 2^8641872 is an apocalyptic number.

It is an amenable number.

8641872 is an abundant number, since it is smaller than the sum of its proper divisors (15543770).

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

8641872 is a wasteful number, since it uses less digits than its factorization.

8641872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60027 (or 60018 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 8641872 is about 2939.7061077598. The cubic root of 8641872 is about 205.2119323226.

The spelling of 8641872 in words is "eight million, six hundred forty-one thousand, eight hundred seventy-two".