2628881 has 4 divisors (see below), whose sum is σ = 2637492. Its totient is φ = 2620272.

The previous prime is 2628839. The next prime is 2628889. The reversal of 2628881 is 1888262.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 330625 + 2298256 = 575^2 + 1516^2 .

It is a cyclic number.

It is not a de Polignac number, because 2628881 - 2⁶ = 2628817 is a prime.

It is a super-2 number, since 2×2628881² = 13822030624322, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2¹¹ + 6⁴ + 2²¹ + 8⁴ + 8⁶ + 8⁶ + 1 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2628889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3830 + ... + 4463.

It is an arithmetic number, because the mean of its divisors is an integer number (659373).

2^2628881 is an apocalyptic number.

It is an amenable number.

2628881 is a deficient number, since it is larger than the sum of its proper divisors (8611).

2628881 is an equidigital number, since it uses as much as digits as its factorization.

2628881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8610.

The product of its digits is 12288, while the sum is 35.

The square root of 2628881 is about 1621.3824348376. The cubic root of 2628881 is about 138.0141587377.

The spelling of 2628881 in words is "two million, six hundred twenty-eight thousand, eight hundred eighty-one".