28461289 has 2 divisors, whose sum is σ = 28461290. Its totient is φ = 28461288.

The previous prime is 28461283. The next prime is 28461337. The reversal of 28461289 is 98216482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25836889 + 2624400 = 5083^2 + 1620^2 .

It is a cyclic number.

It is not a de Polignac number, because 28461289 - 2²¹ = 26364137 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28461283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14230644 + 14230645.

It is an arithmetic number, because the mean of its divisors is an integer number (14230645).

Almost surely, 2^28461289 is an apocalyptic number.

It is an amenable number.

28461289 is a deficient number, since it is larger than the sum of its proper divisors (1).

28461289 is an equidigital number, since it uses as much as digits as its factorization.

28461289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55296, while the sum is 40.

The square root of 28461289 is about 5334.9122766921. The cubic root of 28461289 is about 305.3173763402.

The spelling of 28461289 in words is "twenty-eight million, four hundred sixty-one thousand, two hundred eighty-nine".