28768132 has 24 divisors (see below), whose sum is σ = 51692256. Its totient is φ = 14004288.

The previous prime is 28768123. The next prime is 28768139. The reversal of 28768132 is 23186782.

It is a junction number, because it is equal to n+sod(n) for n = 28768091 and 28768100.

It is not an unprimeable number, because it can be changed into a prime (28768139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23643 + ... + 24829.

It is an arithmetic number, because the mean of its divisors is an integer number (2153844).

Almost surely, 2^28768132 is an apocalyptic number.

It is an amenable number.

28768132 is a deficient number, since it is larger than the sum of its proper divisors (22924124).

28768132 is a wasteful number, since it uses less digits than its factorization.

28768132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1347 (or 1345 counting only the distinct ones).

The product of its digits is 32256, while the sum is 37.

The square root of 28768132 is about 5363.5931985936. The cubic root of 28768132 is about 306.4106722077.

It can be divided in two parts, 28768 and 132, that added together give a square (28900 = 170²).

The spelling of 28768132 in words is "twenty-eight million, seven hundred sixty-eight thousand, one hundred thirty-two".