28108232 has 16 divisors (see below), whose sum is σ = 53698140. Its totient is φ = 13788736.

The previous prime is 28108229. The next prime is 28108243. The reversal of 28108232 is 23280182.

It can be written as a sum of positive squares in 2 ways, for example, as 28026436 + 81796 = 5294^2 + 286^2 .

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, 32723 + ... + 33570.

Almost surely, 2^28108232 is an apocalyptic number.

It is an amenable number.

28108232 is a deficient number, since it is larger than the sum of its proper divisors (25589908).

28108232 is a wasteful number, since it uses less digits than its factorization.

28108232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66352 (or 66348 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 28108232 is about 5301.7197209962. The cubic root of 28108232 is about 304.0496514008.

The spelling of 28108232 in words is "twenty-eight million, one hundred eight thousand, two hundred thirty-two".