28412609 has 2 divisors, whose sum is σ = 28412610. Its totient is φ = 28412608.

The previous prime is 28412603. The next prime is 28412621. The reversal of 28412609 is 90621482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22771984 + 5640625 = 4772^2 + 2375^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28412609 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28412603) 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, 14206304 + 14206305.

It is an arithmetic number, because the mean of its divisors is an integer number (14206305).

Almost surely, 2^28412609 is an apocalyptic number.

It is an amenable number.

28412609 is a deficient number, since it is larger than the sum of its proper divisors (1).

28412609 is an equidigital number, since it uses as much as digits as its factorization.

28412609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 28412609 is about 5330.3479248544. The cubic root of 28412609 is about 305.1432060638.

The spelling of 28412609 in words is "twenty-eight million, four hundred twelve thousand, six hundred nine".