28502132 has 24 divisors (see below), whose sum is σ = 53008200. Its totient is φ = 13363200.

The previous prime is 28502119. The next prime is 28502137. The reversal of 28502132 is 23120582.

It can be written as a sum of positive squares in 4 ways, for example, as 2328676 + 26173456 = 1526^2 + 5116^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28502098 and 28502107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28502137) 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 in 7 ways as a sum of consecutive naturals, for example, 23132 + ... + 24332.

It is an arithmetic number, because the mean of its divisors is an integer number (2208675).

Almost surely, 2^28502132 is an apocalyptic number.

It is an amenable number.

28502132 is a deficient number, since it is larger than the sum of its proper divisors (24506068).

28502132 is a wasteful number, since it uses less digits than its factorization.

28502132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1571 (or 1569 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 28502132 is about 5338.7388023765. The cubic root of 28502132 is about 305.4633537688.

The spelling of 28502132 in words is "twenty-eight million, five hundred two thousand, one hundred thirty-two".