8633397220 has 144 divisors (see below), whose sum is σ = 21749221872. Its totient is φ = 2868203520.

The previous prime is 8633397209. The next prime is 8633397221. The reversal of 8633397220 is 227933368.

It can be written as a sum of positive squares in 8 ways, for example, as 532317184 + 8101080036 = 23072^2 + 90006^2 .

It is not an unprimeable number, because it can be changed into a prime (8633397221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16570560 + ... + 16571080.

It is an arithmetic number, because the mean of its divisors is an integer number (151036263).

Almost surely, 2^8633397220 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 8633397220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10874610936).

8633397220 is an abundant number, since it is smaller than the sum of its proper divisors (13115824652).

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

8633397220 is a wasteful number, since it uses less digits than its factorization.

8633397220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1038 (or 1029 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 43.

The square root of 8633397220 is about 92916.0762193497. The cubic root of 8633397220 is about 2051.4482900707.

The spelling of 8633397220 in words is "eight billion, six hundred thirty-three million, three hundred ninety-seven thousand, two hundred twenty".