28822919 has 2 divisors, whose sum is σ = 28822920. Its totient is φ = 28822918.

The previous prime is 28822907. The next prime is 28822921. The reversal of 28822919 is 91922882.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28822919 - 2⁴ = 28822903 is a prime.

It is a super-2 number, since 2×28822919² = 1661521319361122, which contains 22 as substring.

Together with 28822921, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28822949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14411459 + 14411460.

It is an arithmetic number, because the mean of its divisors is an integer number (14411460).

Almost surely, 2^28822919 is an apocalyptic number.

28822919 is a deficient number, since it is larger than the sum of its proper divisors (1).

28822919 is an equidigital number, since it uses as much as digits as its factorization.

28822919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 41.

The square root of 28822919 is about 5368.6980730900. The cubic root of 28822919 is about 306.6050617956.

The spelling of 28822919 in words is "twenty-eight million, eight hundred twenty-two thousand, nine hundred nineteen".