8421760 has 32 divisors (see below), whose sum is σ = 20134800. Its totient is φ = 3368448.

The previous prime is 8421757. The next prime is 8421773. The reversal of 8421760 is 671248.

It is a tau number, because it is divible by the number of its divisors (32).

It is a d-powerful number, because it can be written as 8⁵ + 4 + 2²³ + 1 + 7³ + 6² + 0 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5940 + ... + 7219.

Almost surely, 2^8421760 is an apocalyptic number.

8421760 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8421760 is an abundant number, since it is smaller than the sum of its proper divisors (11713040).

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

8421760 is a wasteful number, since it uses less digits than its factorization.

8421760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13178 (or 13166 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 8421760 is about 2902.0268778907. The cubic root of 8421760 is about 203.4546500494.

The spelling of 8421760 in words is "eight million, four hundred twenty-one thousand, seven hundred sixty".