2880021 has 16 divisors (see below), whose sum is σ = 4104000. Its totient is φ = 1790208.

The previous prime is 2879999. The next prime is 2880029. The reversal of 2880021 is 1200882.

It is not a de Polignac number, because 2880021 - 2⁷ = 2879893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2880021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2880029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7410 + ... + 7788.

It is an arithmetic number, because the mean of its divisors is an integer number (256500).

2^2880021 is an apocalyptic number.

It is an amenable number.

2880021 is a deficient number, since it is larger than the sum of its proper divisors (1223979).

2880021 is a wasteful number, since it uses less digits than its factorization.

2880021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548.

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 2880021 is about 1697.0624620208. The cubic root of 2880021 is about 142.2760779878.

The spelling of 2880021 in words is "two million, eight hundred eighty thousand, twenty-one".