8880021 has 12 divisors (see below), whose sum is σ = 12955020. Its totient is φ = 5860800.

The previous prime is 8880007. The next prime is 8880023. The reversal of 8880021 is 1200888.

It can be written as a sum of positive squares in 2 ways, for example, as 6275025 + 2604996 = 2505^2 + 1614^2 .

It is not a de Polignac number, because 8880021 - 2⁵ = 8879989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8880023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3976 + ... + 5793.

It is an arithmetic number, because the mean of its divisors is an integer number (1079585).

Almost surely, 2^8880021 is an apocalyptic number.

It is an amenable number.

8880021 is a deficient number, since it is larger than the sum of its proper divisors (4074999).

8880021 is a wasteful number, since it uses less digits than its factorization.

8880021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9876 (or 9873 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 27.

The square root of 8880021 is about 2979.9364087175. The cubic root of 8880021 is about 207.0799243281.

The spelling of 8880021 in words is "eight million, eight hundred eighty thousand, twenty-one".