8921941780 has 24 divisors (see below), whose sum is σ = 18739163520. Its totient is φ = 3568188960.

The previous prime is 8921941733. The next prime is 8921941823. The reversal of 8921941780 is 871491298.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 100185 + ... + 166975.

It is an arithmetic number, because the mean of its divisors is an integer number (780798480).

Almost surely, 2^8921941780 is an apocalyptic number.

It is an amenable number.

8921941780 is an abundant number, since it is smaller than the sum of its proper divisors (9817221740).

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

8921941780 is a wasteful number, since it uses less digits than its factorization.

8921941780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73479 (or 73477 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 49.

The square root of 8921941780 is about 94456.0309350335. The cubic root of 8921941780 is about 2074.0527368354.

The spelling of 8921941780 in words is "eight billion, nine hundred twenty-one million, nine hundred forty-one thousand, seven hundred eighty".