8747252640 has 864 divisors, whose sum is σ = 37655513280. Its totient is φ = 1889879040.

The previous prime is 8747252627. The next prime is 8747252663. The reversal of 8747252640 is 462527478.

It is a happy number.

8747252640 is a `hidden beast` number, since 87 + 4 + 7 + 2 + 526 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (864).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 203424459 + ... + 203424501.

It is an arithmetic number, because the mean of its divisors is an integer number (43582770).

Almost surely, 2^8747252640 is an apocalyptic number.

8747252640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8747252640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18827756640).

8747252640 is an abundant number, since it is smaller than the sum of its proper divisors (28908260640).

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

8747252640 is a wasteful number, since it uses less digits than its factorization.

8747252640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143 (or 91 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 45.

The square root of 8747252640 is about 93526.7482595220. The cubic root of 8747252640 is about 2060.4269577208.

The spelling of 8747252640 in words is "eight billion, seven hundred forty-seven million, two hundred fifty-two thousand, six hundred forty".