8752821390 has 128 divisors (see below), whose sum is σ = 24700723200. Its totient is φ = 2199415680.

The previous prime is 8752821379. The next prime is 8752821397. The reversal of 8752821390 is 931282578.

It is a happy number.

It is a super-2 number, since 2×8752821390² (a number of 21 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8752821397) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 975364 + ... + 984296.

It is an arithmetic number, because the mean of its divisors is an integer number (192974400).

Almost surely, 2^8752821390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8752821390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12350361600).

8752821390 is an abundant number, since it is smaller than the sum of its proper divisors (15947901810).

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

8752821390 is a wasteful number, since it uses less digits than its factorization.

8752821390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9159 (or 9153 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 8752821390 is about 93556.5144177571. The cubic root of 8752821390 is about 2060.8641071155.

The spelling of 8752821390 in words is "eight billion, seven hundred fifty-two million, eight hundred twenty-one thousand, three hundred ninety".