8861020 has 48 divisors (see below), whose sum is σ = 21450240. Its totient is φ = 3011904.

The previous prime is 8860993. The next prime is 8861059. The reversal of 8861020 is 201688.

8861020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam 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, 23191 + ... + 23569.

It is an arithmetic number, because the mean of its divisors is an integer number (446880).

Almost surely, 2^8861020 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 8861020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10725120).

8861020 is an abundant number, since it is smaller than the sum of its proper divisors (12589220).

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

8861020 is a wasteful number, since it uses less digits than its factorization.

8861020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562 (or 560 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 8861020 is about 2976.7465461473. The cubic root of 8861020 is about 206.9321192939.

The spelling of 8861020 in words is "eight million, eight hundred sixty-one thousand, twenty".