8890020864 has 154 divisors (see below), whose sum is σ = 26647088610. Its totient is φ = 2963091456.

The previous prime is 8890020829. The next prime is 8890020869. The reversal of 8890020864 is 4680200988.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 7023780864 + 1866240000 = 83808^2 + 43200^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8890020869) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 740542 + ... + 752450.

Almost surely, 2^8890020864 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 8890020864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13323544305).

8890020864 is an abundant number, since it is smaller than the sum of its proper divisors (17757067746).

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

8890020864 is an equidigital number, since it uses as much as digits as its factorization.

8890020864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11947 (or 11914 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The square root of 8890020864 is about 94286.9071716747. The cubic root of 8890020864 is about 2071.5762663167.

The spelling of 8890020864 in words is "eight billion, eight hundred ninety million, twenty thousand, eight hundred sixty-four".