28858157 has 2 divisors, whose sum is σ = 28858158. Its totient is φ = 28858156.

The previous prime is 28858133. The next prime is 28858177. The reversal of 28858157 is 75185882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18139081 + 10719076 = 4259^2 + 3274^2 .

It is a cyclic number.

It is not a de Polignac number, because 28858157 - 2¹⁰ = 28857133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28858177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14429078 + 14429079.

It is an arithmetic number, because the mean of its divisors is an integer number (14429079).

Almost surely, 2^28858157 is an apocalyptic number.

It is an amenable number.

28858157 is a deficient number, since it is larger than the sum of its proper divisors (1).

28858157 is an equidigital number, since it uses as much as digits as its factorization.

28858157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 179200, while the sum is 44.

The square root of 28858157 is about 5371.9788718870. The cubic root of 28858157 is about 306.7299594997.

The spelling of 28858157 in words is "twenty-eight million, eight hundred fifty-eight thousand, one hundred fifty-seven".