28548691 has 2 divisors, whose sum is σ = 28548692. Its totient is φ = 28548690.

The previous prime is 28548647. The next prime is 28548713. The reversal of 28548691 is 19684582.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28548691 - 2¹⁷ = 28417619 is a prime.

It is not a weakly prime, because it can be changed into another prime (28548601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14274345 + 14274346.

It is an arithmetic number, because the mean of its divisors is an integer number (14274346).

Almost surely, 2^28548691 is an apocalyptic number.

28548691 is a deficient number, since it is larger than the sum of its proper divisors (1).

28548691 is an equidigital number, since it uses as much as digits as its factorization.

28548691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 138240, while the sum is 43.

The square root of 28548691 is about 5343.0975098720. The cubic root of 28548691 is about 305.6295908216.

The spelling of 28548691 in words is "twenty-eight million, five hundred forty-eight thousand, six hundred ninety-one".