28502012 has 48 divisors (see below), whose sum is σ = 64350720. Its totient is φ = 10718400.

The previous prime is 28502009. The next prime is 28502029. The reversal of 28502012 is 21020582.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7337 + ... + 10527.

It is an arithmetic number, because the mean of its divisors is an integer number (1340640).

Almost surely, 2^28502012 is an apocalyptic number.

28502012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28502012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32175360).

28502012 is an abundant number, since it is smaller than the sum of its proper divisors (35848708).

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

28502012 is a wasteful number, since it uses less digits than its factorization.

28502012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3242 (or 3240 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 28502012 is about 5338.7275637552. The cubic root of 28502012 is about 305.4629250798.

Adding to 28502012 its reverse (21020582), we get a palindrome (49522594).

The spelling of 28502012 in words is "twenty-eight million, five hundred two thousand, twelve".