28118032 has 40 divisors (see below), whose sum is σ = 56246400. Its totient is φ = 13610112.

The previous prime is 28118003. The next prime is 28118033. The reversal of 28118032 is 23081182.

Together with 28128368 it forms an amicable pair .

It is a junction number, because it is equal to n+sod(n) for n = 28117988 and 28118006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28118033) 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, 104394 + ... + 104662.

It is an arithmetic number, because the mean of its divisors is an integer number (1406160).

Almost surely, 2^28118032 is an apocalyptic number.

It is an amenable number.

28118032 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

28118032 is a wasteful number, since it uses less digits than its factorization.

28118032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463 (or 457 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 28118032 is about 5302.6438688639. The cubic root of 28118032 is about 304.0849831660.

The spelling of 28118032 in words is "twenty-eight million, one hundred eighteen thousand, thirty-two".