28680832 has 16 divisors (see below), whose sum is σ = 57137850. Its totient is φ = 14340352.

The previous prime is 28680829. The next prime is 28680881. The reversal of 28680832 is 23808682.

It can be written as a sum of positive squares in only one way, i.e., 28472896 + 207936 = 5336^2 + 456^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 28680791 and 28680800.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111907 + ... + 112162.

Almost surely, 2^28680832 is an apocalyptic number.

It is an amenable number.

28680832 is a deficient number, since it is larger than the sum of its proper divisors (28457018).

28680832 is an equidigital number, since it uses as much as digits as its factorization.

28680832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224083 (or 224071 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 28680832 is about 5355.4488140584. The cubic root of 28680832 is about 306.1004127439.

It can be divided in two parts, 286 and 80832, that added together give a palindrome (81118).

The spelling of 28680832 in words is "twenty-eight million, six hundred eighty thousand, eight hundred thirty-two".