28102732 has 24 divisors (see below), whose sum is σ = 56318976. Its totient is φ = 12019728.

The previous prime is 28102727. The next prime is 28102733. The reversal of 28102732 is 23720182.

It is a junction number, because it is equal to n+sod(n) for n = 28102697 and 28102706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28102733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23583 + ... + 24745.

It is an arithmetic number, because the mean of its divisors is an integer number (2346624).

Almost surely, 2^28102732 is an apocalyptic number.

It is an amenable number.

28102732 is an abundant number, since it is smaller than the sum of its proper divisors (28216244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28102732 is a wasteful number, since it uses less digits than its factorization.

28102732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2037 (or 2035 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 28102732 is about 5301.2009960008. The cubic root of 28102732 is about 304.0298187509.

The spelling of 28102732 in words is "twenty-eight million, one hundred two thousand, seven hundred thirty-two".