28525633 has 4 divisors (see below), whose sum is σ = 28582848. Its totient is φ = 28468420.

The previous prime is 28525621. The next prime is 28525639. The reversal of 28525633 is 33652582.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28525633 - 2²¹ = 26428481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28525639) 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, 27853 + ... + 28858.

It is an arithmetic number, because the mean of its divisors is an integer number (7145712).

Almost surely, 2^28525633 is an apocalyptic number.

It is an amenable number.

28525633 is a deficient number, since it is larger than the sum of its proper divisors (57215).

28525633 is an equidigital number, since it uses as much as digits as its factorization.

28525633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57214.

The product of its digits is 43200, while the sum is 34.

The square root of 28525633 is about 5340.9393368583. The cubic root of 28525633 is about 305.5472857609.

The spelling of 28525633 in words is "twenty-eight million, five hundred twenty-five thousand, six hundred thirty-three".