28533004 has 12 divisors (see below), whose sum is σ = 52870104. Its totient is φ = 13427264.

The previous prime is 28532971. The next prime is 28533017. The reversal of 28533004 is 40033582.

It is a self number, because there is not a number n which added to its sum of digits gives 28533004.

It is an unprimeable number.

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, 209734 + ... + 209869.

It is an arithmetic number, because the mean of its divisors is an integer number (4405842).

Almost surely, 2^28533004 is an apocalyptic number.

It is an amenable number.

28533004 is a deficient number, since it is larger than the sum of its proper divisors (24337100).

28533004 is a wasteful number, since it uses less digits than its factorization.

28533004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419624 (or 419622 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 28533004 is about 5341.6293394432. The cubic root of 28533004 is about 305.5736012164.

Adding to 28533004 its reverse (40033582), we get a palindrome (68566586).

The spelling of 28533004 in words is "twenty-eight million, five hundred thirty-three thousand, four".