28817012 has 12 divisors (see below), whose sum is σ = 57634080. Its totient is φ = 12350136.

The previous prime is 28817003. The next prime is 28817069. The reversal of 28817012 is 21071882.

28817012 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 514562 + ... + 514617.

It is an arithmetic number, because the mean of its divisors is an integer number (4802840).

Almost surely, 2^28817012 is an apocalyptic number.

It is an amenable number.

28817012 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28817012 is a wasteful number, since it uses less digits than its factorization.

28817012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1029190 (or 1029188 counting only the distinct ones).

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

The square root of 28817012 is about 5368.1479115240. The cubic root of 28817012 is about 306.5841150410.

Adding to 28817012 its reverse (21071882), we get a palindrome (49888894).

The spelling of 28817012 in words is "twenty-eight million, eight hundred seventeen thousand, twelve".