28232819 has 2 divisors, whose sum is σ = 28232820. Its totient is φ = 28232818.

The previous prime is 28232797. The next prime is 28232821. The reversal of 28232819 is 91823282.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28232819 is a prime.

It is a super-2 number, since 2×28232819² = 1594184137373522, which contains 22 as substring.

Together with 28232821, 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 (28232419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14116409 + 14116410.

It is an arithmetic number, because the mean of its divisors is an integer number (14116410).

Almost surely, 2^28232819 is an apocalyptic number.

28232819 is a deficient number, since it is larger than the sum of its proper divisors (1).

28232819 is an equidigital number, since it uses as much as digits as its factorization.

28232819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 35.

The square root of 28232819 is about 5313.4564080267. The cubic root of 28232819 is about 304.4982128035.

The spelling of 28232819 in words is "twenty-eight million, two hundred thirty-two thousand, eight hundred nineteen".