8421761928 has 32 divisors (see below), whose sum is σ = 21502373760. Its totient is φ = 2747524800.

The previous prime is 8421761917. The next prime is 8421761941. The reversal of 8421761928 is 8291671248.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3731923 + ... + 3734178.

It is an arithmetic number, because the mean of its divisors is an integer number (671949180).

Almost surely, 2^8421761928 is an apocalyptic number.

It is an amenable number.

8421761928 is an abundant number, since it is smaller than the sum of its proper divisors (13080611832).

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

8421761928 is a wasteful number, since it uses less digits than its factorization.

8421761928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7466157 (or 7466153 counting only the distinct ones).

The product of its digits is 387072, while the sum is 48.

The square root of 8421761928 is about 91770.1581561239. The cubic root of 8421761928 is about 2034.5466557510.

The spelling of 8421761928 in words is "eight billion, four hundred twenty-one million, seven hundred sixty-one thousand, nine hundred twenty-eight".