28810057 has 2 divisors, whose sum is σ = 28810058. Its totient is φ = 28810056.

The previous prime is 28810049. The next prime is 28810063. The reversal of 28810057 is 75001882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20394256 + 8415801 = 4516^2 + 2901^2 .

It is a cyclic number.

It is not a de Polignac number, because 28810057 - 2³ = 28810049 is a prime.

It is a Chen prime.

It is the 5368-th Hogben number.

It is not a weakly prime, because it can be changed into another prime (28810097) by changing a digit.

It is a nontrivial repunit in base 5367.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14405028 + 14405029.

It is an arithmetic number, because the mean of its divisors is an integer number (14405029).

Almost surely, 2^28810057 is an apocalyptic number.

It is an amenable number.

28810057 is a deficient number, since it is larger than the sum of its proper divisors (1).

28810057 is an equidigital number, since it uses as much as digits as its factorization.

28810057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 28810057 is about 5367.5000698649. The cubic root of 28810057 is about 306.5594483142.

The spelling of 28810057 in words is "twenty-eight million, eight hundred ten thousand, fifty-seven".