28274443 has 2 divisors, whose sum is σ = 28274444. Its totient is φ = 28274442.

The previous prime is 28274437. The next prime is 28274447. The reversal of 28274443 is 34447282.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28274443 is a prime.

It is equal to p_1757455 and since 28274443 and 1757455 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 28274399 and 28274408.

It is not a weakly prime, because it can be changed into another prime (28274447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14137221 + 14137222.

It is an arithmetic number, because the mean of its divisors is an integer number (14137222).

Almost surely, 2^28274443 is an apocalyptic number.

28274443 is a deficient number, since it is larger than the sum of its proper divisors (1).

28274443 is an equidigital number, since it uses as much as digits as its factorization.

28274443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43008, while the sum is 34.

The square root of 28274443 is about 5317.3718132175. The cubic root of 28274443 is about 304.6477811718.

The spelling of 28274443 in words is "twenty-eight million, two hundred seventy-four thousand, four hundred forty-three".