8661072 has 80 divisors (see below), whose sum is σ = 25891200. Its totient is φ = 2443776.

The previous prime is 8661061. The next prime is 8661089. The reversal of 8661072 is 2701668.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49978 + ... + 50150.

It is an arithmetic number, because the mean of its divisors is an integer number (323640).

Almost surely, 2^8661072 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 8661072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12945600).

8661072 is an abundant number, since it is smaller than the sum of its proper divisors (17230128).

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

8661072 is a wasteful number, since it uses less digits than its factorization.

8661072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340 (or 334 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 8661072 is about 2942.9699284906. The cubic root of 8661072 is about 205.3637958215.

The spelling of 8661072 in words is "eight million, six hundred sixty-one thousand, seventy-two".