28989757 has 2 divisors, whose sum is σ = 28989758. Its totient is φ = 28989756.

The previous prime is 28989731. The next prime is 28989787. The reversal of 28989757 is 75798982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28955161 + 34596 = 5381^2 + 186^2 .

It is a cyclic number.

It is not a de Polignac number, because 28989757 - 2⁷ = 28989629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28989698 and 28989707.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28989707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14494878 + 14494879.

It is an arithmetic number, because the mean of its divisors is an integer number (14494879).

Almost surely, 2^28989757 is an apocalyptic number.

It is an amenable number.

28989757 is a deficient number, since it is larger than the sum of its proper divisors (1).

28989757 is an equidigital number, since it uses as much as digits as its factorization.

28989757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2540160, while the sum is 55.

The square root of 28989757 is about 5384.2136844668. The cubic root of 28989757 is about 307.1955061926.

It can be divided in two parts, 2898975 and 7, that added together give a palindrome (2898982).

The spelling of 28989757 in words is "twenty-eight million, nine hundred eighty-nine thousand, seven hundred fifty-seven".