8817638540 has 72 divisors (see below), whose sum is σ = 19761447552. Its totient is φ = 3304212480.

The previous prime is 8817638527. The next prime is 8817638549. The reversal of 8817638540 is 458367188.

It is not an unprimeable number, because it can be changed into a prime (8817638549) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1285520 + ... + 1292360.

Almost surely, 2^8817638540 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 8817638540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9880723776).

8817638540 is an abundant number, since it is smaller than the sum of its proper divisors (10943809012).

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

8817638540 is a wasteful number, since it uses less digits than its factorization.

8817638540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7107 (or 7088 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 50.

The square root of 8817638540 is about 93902.2818679078. The cubic root of 8817638540 is about 2065.9386977647.

The spelling of 8817638540 in words is "eight billion, eight hundred seventeen million, six hundred thirty-eight thousand, five hundred forty".