28028552 has 8 divisors (see below), whose sum is σ = 52553550. Its totient is φ = 14014272.

The previous prime is 28028549. The next prime is 28028593. The reversal of 28028552 is 25582082.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 28026436 + 2116 = 5294^2 + 46^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1751777 + ... + 1751792.

Almost surely, 2^28028552 is an apocalyptic number.

It is an amenable number.

28028552 is a deficient number, since it is larger than the sum of its proper divisors (24524998).

28028552 is a wasteful number, since it uses less digits than its factorization.

28028552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3503575 (or 3503571 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 32.

The square root of 28028552 is about 5294.1998451135. The cubic root of 28028552 is about 303.7620772293.

The spelling of 28028552 in words is "twenty-eight million, twenty-eight thousand, five hundred fifty-two".