28028452 has 6 divisors (see below), whose sum is σ = 49049798. Its totient is φ = 14014224.

The previous prime is 28028449. The next prime is 28028491. The reversal of 28028452 is 25482082.

It can be written as a sum of positive squares in only one way, i.e., 18455616 + 9572836 = 4296^2 + 3094^2 .

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, 3503553 + ... + 3503560.

Almost surely, 2^28028452 is an apocalyptic number.

It is an amenable number.

28028452 is a deficient number, since it is larger than the sum of its proper divisors (21021346).

28028452 is a wasteful number, since it uses less digits than its factorization.

28028452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7007117 (or 7007115 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 31.

The square root of 28028452 is about 5294.1904008073. The cubic root of 28028452 is about 303.7617159757.

The spelling of 28028452 in words is "twenty-eight million, twenty-eight thousand, four hundred fifty-two".