28633529 has 4 divisors (see below), whose sum is σ = 28650276. Its totient is φ = 28616784.

The previous prime is 28633511. The next prime is 28633531. The reversal of 28633529 is 92533682.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13987600 + 14645929 = 3740^2 + 3827^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28633529 is a prime.

It is a pancake number, because a pancake can be divided into 28633529 parts by 7567 straight cuts.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28633492 and 28633501.

It is not an unprimeable number, because it can be changed into a prime (28630529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5474 + ... + 9339.

It is an arithmetic number, because the mean of its divisors is an integer number (7162569).

Almost surely, 2^28633529 is an apocalyptic number.

It is an amenable number.

28633529 is a deficient number, since it is larger than the sum of its proper divisors (16747).

28633529 is a wasteful number, since it uses less digits than its factorization.

28633529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16746.

The product of its digits is 77760, while the sum is 38.

The square root of 28633529 is about 5351.0306483891. The cubic root of 28633529 is about 305.9320373936.

The spelling of 28633529 in words is "twenty-eight million, six hundred thirty-three thousand, five hundred twenty-nine".