8821961540 has 48 divisors (see below), whose sum is σ = 21253300992. Its totient is φ = 3013159296.

The previous prime is 8821961537. The next prime is 8821961563. The reversal of 8821961540 is 451691288.

It is a super-3 number, since 3×8821961540³ (a number of 31 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8821961491 and 8821961500.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82979 + ... + 156618.

It is an arithmetic number, because the mean of its divisors is an integer number (442777104).

Almost surely, 2^8821961540 is an apocalyptic number.

It is an amenable number.

8821961540 is an abundant number, since it is smaller than the sum of its proper divisors (12431339452).

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

8821961540 is a wasteful number, since it uses less digits than its factorization.

8821961540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239876 (or 239874 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 44.

The square root of 8821961540 is about 93925.2976572340. The cubic root of 8821961540 is about 2066.2762633466.

The spelling of 8821961540 in words is "eight billion, eight hundred twenty-one million, nine hundred sixty-one thousand, five hundred forty".