28822949 has 2 divisors, whose sum is σ = 28822950. Its totient is φ = 28822948.

The previous prime is 28822921. The next prime is 28822951. The reversal of 28822949 is 94922882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24750625 + 4072324 = 4975^2 + 2018^2 .

It is a cyclic number.

It is not a de Polignac number, because 28822949 - 2⁸ = 28822693 is a prime.

It is a Sophie Germain prime.

Together with 28822951, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28822919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14411474 + 14411475.

It is an arithmetic number, because the mean of its divisors is an integer number (14411475).

Almost surely, 2^28822949 is an apocalyptic number.

It is an amenable number.

28822949 is a deficient number, since it is larger than the sum of its proper divisors (1).

28822949 is an equidigital number, since it uses as much as digits as its factorization.

28822949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165888, while the sum is 44.

The square root of 28822949 is about 5368.7008670627. The cubic root of 28822949 is about 306.6051681710.

The spelling of 28822949 in words is "twenty-eight million, eight hundred twenty-two thousand, nine hundred forty-nine".