28845729 has 12 divisors (see below), whose sum is σ = 45454032. Its totient is φ = 17482200.

The previous prime is 28845721. The next prime is 28845769. The reversal of 28845729 is 92754882.

It is not a de Polignac number, because 28845729 - 2³ = 28845721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28845721) 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 in 11 ways as a sum of consecutive naturals, for example, 145587 + ... + 145784.

It is an arithmetic number, because the mean of its divisors is an integer number (3787836).

Almost surely, 2^28845729 is an apocalyptic number.

It is an amenable number.

28845729 is a deficient number, since it is larger than the sum of its proper divisors (16608303).

28845729 is a wasteful number, since it uses less digits than its factorization.

28845729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291388 (or 291385 counting only the distinct ones).

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

The square root of 28845729 is about 5370.8220041256. The cubic root of 28845729 is about 306.6859212601.

The spelling of 28845729 in words is "twenty-eight million, eight hundred forty-five thousand, seven hundred twenty-nine".