28254157 has 2 divisors, whose sum is σ = 28254158. Its totient is φ = 28254156.

The previous prime is 28254103. The next prime is 28254167. The reversal of 28254157 is 75145282.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14333796 + 13920361 = 3786^2 + 3731^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28254157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28254167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14127078 + 14127079.

It is an arithmetic number, because the mean of its divisors is an integer number (14127079).

Almost surely, 2^28254157 is an apocalyptic number.

It is an amenable number.

28254157 is a deficient number, since it is larger than the sum of its proper divisors (1).

28254157 is an equidigital number, since it uses as much as digits as its factorization.

28254157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22400, while the sum is 34.

The square root of 28254157 is about 5315.4639496473. The cubic root of 28254157 is about 304.5749054246.

The spelling of 28254157 in words is "twenty-eight million, two hundred fifty-four thousand, one hundred fifty-seven".