8725644 has 72 divisors (see below), whose sum is σ = 23482368. Its totient is φ = 2831760.

The previous prime is 8725643. The next prime is 8725657. The reversal of 8725644 is 4465278.

8725644 is a `hidden beast` number, since 8 + 7 + 2 + 5 + 644 = 666.

8725644 is nontrivially palindromic in base 8.

8725644 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×8725644² = 152273726429472, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 8725599 and 8725608.

It is not an unprimeable number, because it can be changed into a prime (8725643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45589 + ... + 45779.

It is an arithmetic number, because the mean of its divisors is an integer number (326144).

Almost surely, 2^8725644 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 8725644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11741184).

8725644 is an abundant number, since it is smaller than the sum of its proper divisors (14756724).

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

8725644 is a wasteful number, since it uses less digits than its factorization.

8725644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257 (or 243 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 8725644 is about 2953.9201072473. The cubic root of 8725644 is about 205.8728910770.

The spelling of 8725644 in words is "eight million, seven hundred twenty-five thousand, six hundred forty-four".