28133057 has 2 divisors, whose sum is σ = 28133058. Its totient is φ = 28133056.

The previous prime is 28133047. The next prime is 28133059. The reversal of 28133057 is 75033182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25969216 + 2163841 = 5096^2 + 1471^2 .

It is a cyclic number.

It is not a de Polignac number, because 28133057 - 2⁸ = 28132801 is a prime.

Together with 28133059, 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 (28133059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14066528 + 14066529.

It is an arithmetic number, because the mean of its divisors is an integer number (14066529).

Almost surely, 2^28133057 is an apocalyptic number.

It is an amenable number.

28133057 is a deficient number, since it is larger than the sum of its proper divisors (1).

28133057 is an equidigital number, since it uses as much as digits as its factorization.

28133057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 28133057 is about 5304.0604257493. The cubic root of 28133057 is about 304.1391365922.

The spelling of 28133057 in words is "twenty-eight million, one hundred thirty-three thousand, fifty-seven".