28718012 has 12 divisors (see below), whose sum is σ = 50718360. Its totient is φ = 14227056.

The previous prime is 28717993. The next prime is 28718017. The reversal of 28718012 is 21081782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28718017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32498 + ... + 33369.

It is an arithmetic number, because the mean of its divisors is an integer number (4226530).

Almost surely, 2^28718012 is an apocalyptic number.

It is an amenable number.

28718012 is a deficient number, since it is larger than the sum of its proper divisors (22000348).

28718012 is a wasteful number, since it uses less digits than its factorization.

28718012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65980 (or 65978 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 29.

The square root of 28718012 is about 5358.9189208272. The cubic root of 28718012 is about 306.2326253089.

Adding to 28718012 its reverse (21081782), we get a palindrome (49799794).

The spelling of 28718012 in words is "twenty-eight million, seven hundred eighteen thousand, twelve".