28750132 has 12 divisors (see below), whose sum is σ = 50395716. Its totient is φ = 14351360.

The previous prime is 28750129. The next prime is 28750157. The reversal of 28750132 is 23105782.

It can be written as a sum of positive squares in 2 ways, for example, as 12702096 + 16048036 = 3564^2 + 4006^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28750132.

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 in 3 ways as a sum of consecutive naturals, for example, 3043 + ... + 8170.

It is an arithmetic number, because the mean of its divisors is an integer number (4199643).

Almost surely, 2^28750132 is an apocalyptic number.

It is an amenable number.

28750132 is a deficient number, since it is larger than the sum of its proper divisors (21645584).

28750132 is a wasteful number, since it uses less digits than its factorization.

28750132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11858 (or 11856 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 28750132 is about 5361.9149564311. The cubic root of 28750132 is about 306.3467526037.

It can be divided in two parts, 28750 and 132, that added together give a palindrome (28882).

The spelling of 28750132 in words is "twenty-eight million, seven hundred fifty thousand, one hundred thirty-two".