28528929 has 48 divisors (see below), whose sum is σ = 50266944. Its totient is φ = 15940800.

The previous prime is 28528891. The next prime is 28528939. The reversal of 28528929 is 92982582.

It is not a de Polignac number, because 28528929 - 2²⁴ = 11751713 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28528939) 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 47 ways as a sum of consecutive naturals, for example, 34339 + ... + 35159.

It is an arithmetic number, because the mean of its divisors is an integer number (1047228).

Almost surely, 2^28528929 is an apocalyptic number.

It is an amenable number.

28528929 is a deficient number, since it is larger than the sum of its proper divisors (21738015).

28528929 is a wasteful number, since it uses less digits than its factorization.

28528929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860 (or 848 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 28528929 is about 5341.2478879004. The cubic root of 28528929 is about 305.5590534818.

It can be divided in two parts, 2852 and 8929, that added together give a triangular number (11781 = T₁₅₃).

The spelling of 28528929 in words is "twenty-eight million, five hundred twenty-eight thousand, nine hundred twenty-nine".