28520132 has 24 divisors (see below), whose sum is σ = 50948352. Its totient is φ = 13966400.

The previous prime is 28520131. The next prime is 28520143. The reversal of 28520132 is 23102582.

It is a junction number, because it is equal to n+sod(n) for n = 28520098 and 28520107.

It is not an unprimeable number, because it can be changed into a prime (28520131) 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, 65957 + ... + 66387.

It is an arithmetic number, because the mean of its divisors is an integer number (2122848).

Almost surely, 2^28520132 is an apocalyptic number.

It is an amenable number.

28520132 is a deficient number, since it is larger than the sum of its proper divisors (22428220).

28520132 is a wasteful number, since it uses less digits than its factorization.

28520132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739 (or 737 counting only the distinct ones).

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

The square root of 28520132 is about 5340.4243277103. The cubic root of 28520132 is about 305.5276435012.

The spelling of 28520132 in words is "twenty-eight million, five hundred twenty thousand, one hundred thirty-two".