2628889 has 2 divisors, whose sum is σ = 2628890. Its totient is φ = 2628888.

The previous prime is 2628839. The next prime is 2628911. The reversal of 2628889 is 9888262.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2624400 + 4489 = 1620^2 + 67^2 .

It is a cyclic number.

It is not a de Polignac number, because 2628889 - 2¹⁹ = 2104601 is a prime.

It is a super-2 number, since 2×2628889² = 13822114748642, which contains 22 as substring.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2¹¹ + 6⁴ + 2²¹ + 8⁴ + 8⁶ + 8⁶ + 9 .

It is not a weakly prime, because it can be changed into another prime (2628809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1314444 + 1314445.

It is an arithmetic number, because the mean of its divisors is an integer number (1314445).

2^2628889 is an apocalyptic number.

It is an amenable number.

2628889 is a deficient number, since it is larger than the sum of its proper divisors (1).

2628889 is an equidigital number, since it uses as much as digits as its factorization.

2628889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 110592, while the sum is 43.

The square root of 2628889 is about 1621.3849018663. The cubic root of 2628889 is about 138.0142987354.

The spelling of 2628889 in words is "two million, six hundred twenty-eight thousand, eight hundred eighty-nine".