28542897 has 6 divisors (see below), whose sum is σ = 41228642. Its totient is φ = 19028592.

The previous prime is 28542893. The next prime is 28542979. The reversal of 28542897 is 79824582.

28542897 is a `hidden beast` number, since 28 + 542 + 89 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 22667121 + 5875776 = 4761^2 + 2424^2 .

It is not a de Polignac number, because 28542897 - 2² = 28542893 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28542893) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1585708 + ... + 1585725.

Almost surely, 2^28542897 is an apocalyptic number.

It is an amenable number.

28542897 is a deficient number, since it is larger than the sum of its proper divisors (12685745).

28542897 is a wasteful number, since it uses less digits than its factorization.

28542897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3171439 (or 3171436 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 28542897 is about 5342.5552875005. Note that the first 3 decimals coincide. The cubic root of 28542897 is about 305.6089134268.

The spelling of 28542897 in words is "twenty-eight million, five hundred forty-two thousand, eight hundred ninety-seven".