28645533 has 24 divisors (see below), whose sum is σ = 48921600. Its totient is φ = 15803424.

The previous prime is 28645531. The next prime is 28645567. The reversal of 28645533 is 33554682.

It is a happy number.

28645533 is a `hidden beast` number, since 2 + 8 + 645 + 5 + 3 + 3 = 666.

It is not a de Polignac number, because 28645533 - 2¹ = 28645531 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28645531) 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 23 ways as a sum of consecutive naturals, for example, 6013 + ... + 9666.

It is an arithmetic number, because the mean of its divisors is an integer number (2038400).

Almost surely, 2^28645533 is an apocalyptic number.

It is an amenable number.

28645533 is a deficient number, since it is larger than the sum of its proper divisors (20276067).

28645533 is a wasteful number, since it uses less digits than its factorization.

28645533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15721 (or 15718 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 28645533 is about 5352.1521839350. The cubic root of 28645533 is about 305.9747832610.

The spelling of 28645533 in words is "twenty-eight million, six hundred forty-five thousand, five hundred thirty-three".