28495897 has 2 divisors, whose sum is σ = 28495898. Its totient is φ = 28495896.

The previous prime is 28495891. The next prime is 28495933. The reversal of 28495897 is 79859482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25040016 + 3455881 = 5004^2 + 1859^2 .

It is a cyclic number.

It is not a de Polignac number, because 28495897 - 2³ = 28495889 is a prime.

It is a super-2 number, since 2×28495897² = 1624032291669218, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28495891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14247948 + 14247949.

It is an arithmetic number, because the mean of its divisors is an integer number (14247949).

Almost surely, 2^28495897 is an apocalyptic number.

It is an amenable number.

28495897 is a deficient number, since it is larger than the sum of its proper divisors (1).

28495897 is an equidigital number, since it uses as much as digits as its factorization.

28495897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1451520, while the sum is 52.

The square root of 28495897 is about 5338.1548310254. The cubic root of 28495897 is about 305.4410782082.

It can be divided in two parts, 28495 and 897, that added together give a palindrome (29392).

The spelling of 28495897 in words is "twenty-eight million, four hundred ninety-five thousand, eight hundred ninety-seven".