2788889 has 2 divisors, whose sum is σ = 2788890. Its totient is φ = 2788888.

The previous prime is 2788831. The next prime is 2788927. The reversal of 2788889 is 9888872.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2778889 + 10000 = 1667^2 + 100^2 .

It is a cyclic number.

It is not a de Polignac number, because 2788889 - 2⁸ = 2788633 is a prime.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (2788829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1394444 + 1394445.

It is an arithmetic number, because the mean of its divisors is an integer number (1394445).

2^2788889 is an apocalyptic number.

It is an amenable number.

2788889 is a deficient number, since it is larger than the sum of its proper divisors (1).

2788889 is an equidigital number, since it uses as much as digits as its factorization.

2788889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 516096, while the sum is 50.

The square root of 2788889 is about 1669.9967065836. The cubic root of 2788889 is about 140.7592928820.

The spelling of 2788889 in words is "two million, seven hundred eighty-eight thousand, eight hundred eighty-nine".