28245157 has 2 divisors, whose sum is σ = 28245158. Its totient is φ = 28245156.

The previous prime is 28245079. The next prime is 28245163. The reversal of 28245157 is 75154282.

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., 28238596 + 6561 = 5314^2 + 81^2 .

It is a cyclic number.

It is not a de Polignac number, because 28245157 - 2¹¹ = 28243109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28246157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14122578 + 14122579.

It is an arithmetic number, because the mean of its divisors is an integer number (14122579).

Almost surely, 2^28245157 is an apocalyptic number.

It is an amenable number.

28245157 is a deficient number, since it is larger than the sum of its proper divisors (1).

28245157 is an equidigital number, since it uses as much as digits as its factorization.

28245157 is an evil number, because the sum of its binary digits is even.

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

The square root of 28245157 is about 5314.6172957232. The cubic root of 28245157 is about 304.5425625113.

The spelling of 28245157 in words is "twenty-eight million, two hundred forty-five thousand, one hundred fifty-seven".