28007528 has 8 divisors (see below), whose sum is σ = 52514130. Its totient is φ = 14003760.

The previous prime is 28007521. The next prime is 28007549. The reversal of 28007528 is 82570082.

It can be written as a sum of positive squares in only one way, i.e., 20268004 + 7739524 = 4502^2 + 2782^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 28007494 and 28007503.

It is not an unprimeable number, because it can be changed into a prime (28007521) by changing a digit.

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, 1750463 + ... + 1750478.

Almost surely, 2^28007528 is an apocalyptic number.

It is an amenable number.

28007528 is a deficient number, since it is larger than the sum of its proper divisors (24506602).

28007528 is a wasteful number, since it uses less digits than its factorization.

28007528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3500947 (or 3500943 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 28007528 is about 5292.2139034623. The cubic root of 28007528 is about 303.6861083702.

The spelling of 28007528 in words is "twenty-eight million, seven thousand, five hundred twenty-eight".