28593729 has 20 divisors (see below), whose sum is σ = 42932736. Its totient is φ = 18965016.

The previous prime is 28593709. The next prime is 28593737. The reversal of 28593729 is 92739582.

It is not a de Polignac number, because 28593729 - 2¹² = 28589633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28593709) 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 19 ways as a sum of consecutive naturals, for example, 17272 + ... + 18854.

Almost surely, 2^28593729 is an apocalyptic number.

It is an amenable number.

28593729 is a deficient number, since it is larger than the sum of its proper divisors (14339007).

28593729 is a wasteful number, since it uses less digits than its factorization.

28593729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1818 (or 1809 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 28593729 is about 5347.3104454483. The cubic root of 28593729 is about 305.7902253131.

The spelling of 28593729 in words is "twenty-eight million, five hundred ninety-three thousand, seven hundred twenty-nine".