28475633 has 4 divisors (see below), whose sum is σ = 29713728. Its totient is φ = 27237540.

The previous prime is 28475591. The next prime is 28475669. The reversal of 28475633 is 33657482.

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 28475633 - 2⁶ = 28475569 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28475693) 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 3 ways as a sum of consecutive naturals, for example, 619013 + ... + 619058.

It is an arithmetic number, because the mean of its divisors is an integer number (7428432).

Almost surely, 2^28475633 is an apocalyptic number.

28475633 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

28475633 is a deficient number, since it is larger than the sum of its proper divisors (1238095).

28475633 is a wasteful number, since it uses less digits than its factorization.

28475633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1238094.

The product of its digits is 120960, while the sum is 38.

The square root of 28475633 is about 5336.2564593543. The cubic root of 28475633 is about 305.3686592942.

The spelling of 28475633 in words is "twenty-eight million, four hundred seventy-five thousand, six hundred thirty-three".