8868509640 has 64 divisors (see below), whose sum is σ = 29561702400. Its totient is φ = 2364935616.

The previous prime is 8868509627. The next prime is 8868509641. The reversal of 8868509640 is 469058688.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (8868509641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4104712 + ... + 4106871.

It is an arithmetic number, because the mean of its divisors is an integer number (461901600).

Almost surely, 2^8868509640 is an apocalyptic number.

It is an amenable number.

8868509640 is an abundant number, since it is smaller than the sum of its proper divisors (20693192760).

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

8868509640 is a wasteful number, since it uses less digits than its factorization.

8868509640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8211603 (or 8211593 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 54.

The square root of 8868509640 is about 94172.7648526898. The cubic root of 8868509640 is about 2069.9040493227.

The spelling of 8868509640 in words is "eight billion, eight hundred sixty-eight million, five hundred nine thousand, six hundred forty".