8717891490 has 480 divisors, whose sum is σ = 29977782912. Its totient is φ = 1779148800.

The previous prime is 8717891477. The next prime is 8717891527. The reversal of 8717891490 is 941987178.

8717891490 is a `hidden beast` number, since 8 + 71 + 7 + 89 + 1 + 490 = 666.

It is a super-3 number, since 3×8717891490³ (a number of 31 digits) contains 333 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 66548725 + ... + 66548855.

Almost surely, 2^8717891490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8717891490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14988891456).

8717891490 is an abundant number, since it is smaller than the sum of its proper divisors (21259891422).

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

8717891490 is a wasteful number, since it uses less digits than its factorization.

8717891490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276 (or 256 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 54.

The square root of 8717891490 is about 93369.6497262360. The cubic root of 8717891490 is about 2058.1190209025.

The spelling of 8717891490 in words is "eight billion, seven hundred seventeen million, eight hundred ninety-one thousand, four hundred ninety".