28988249 has 2 divisors, whose sum is σ = 28988250. Its totient is φ = 28988248.

The previous prime is 28988233. The next prime is 28988251. The reversal of 28988249 is 94288982.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25321024 + 3667225 = 5032^2 + 1915^2 .

It is a cyclic number.

It is not a de Polignac number, because 28988249 - 2⁴ = 28988233 is a prime.

Together with 28988251, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 28988197 and 28988206.

It is not a weakly prime, because it can be changed into another prime (28988209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14494124 + 14494125.

It is an arithmetic number, because the mean of its divisors is an integer number (14494125).

Almost surely, 2^28988249 is an apocalyptic number.

It is an amenable number.

28988249 is a deficient number, since it is larger than the sum of its proper divisors (1).

28988249 is an equidigital number, since it uses as much as digits as its factorization.

28988249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 663552, while the sum is 50.

The square root of 28988249 is about 5384.0736436271. The cubic root of 28988249 is about 307.1901794968.

The spelling of 28988249 in words is "twenty-eight million, nine hundred eighty-eight thousand, two hundred forty-nine".