28823489 has 2 divisors, whose sum is σ = 28823490. Its totient is φ = 28823488.

The previous prime is 28823471. The next prime is 28823491. The reversal of 28823489 is 98432882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26863489 + 1960000 = 5183^2 + 1400^2 .

It is a cyclic number.

It is not a de Polignac number, because 28823489 - 2¹² = 28819393 is a prime.

Together with 28823491, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28823189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14411744 + 14411745.

It is an arithmetic number, because the mean of its divisors is an integer number (14411745).

Almost surely, 2^28823489 is an apocalyptic number.

It is an amenable number.

28823489 is a deficient number, since it is larger than the sum of its proper divisors (1).

28823489 is an equidigital number, since it uses as much as digits as its factorization.

28823489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 221184, while the sum is 44.

The square root of 28823489 is about 5368.7511583235. The cubic root of 28823489 is about 306.6070829156.

The spelling of 28823489 in words is "twenty-eight million, eight hundred twenty-three thousand, four hundred eighty-nine".