28506633 has 8 divisors (see below), whose sum is σ = 38726208. Its totient is φ = 18645744.

The previous prime is 28506629. The next prime is 28506641. The reversal of 28506633 is 33660582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28506633 - 2² = 28506629 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28506594 and 28506603.

It is not an unprimeable number, because it can be changed into a prime (28506133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89485 + ... + 89802.

It is an arithmetic number, because the mean of its divisors is an integer number (4840776).

Almost surely, 2^28506633 is an apocalyptic number.

It is an amenable number.

28506633 is a deficient number, since it is larger than the sum of its proper divisors (10219575).

28506633 is a wasteful number, since it uses less digits than its factorization.

28506633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179343.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 28506633 is about 5339.1603272425. The cubic root of 28506633 is about 305.4794323109.

The spelling of 28506633 in words is "twenty-eight million, five hundred six thousand, six hundred thirty-three".