28544012 has 48 divisors (see below), whose sum is σ = 60211200. Its totient is φ = 11575872.

The previous prime is 28543997. The next prime is 28544017. The reversal of 28544012 is 21044582.

It is a happy number.

It is a super-2 number, since 2×28544012² = 1629521242112288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28544017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81614 + ... + 81962.

It is an arithmetic number, because the mean of its divisors is an integer number (1254400).

Almost surely, 2^28544012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28544012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30105600).

28544012 is an abundant number, since it is smaller than the sum of its proper divisors (31667188).

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

28544012 is a wasteful number, since it uses less digits than its factorization.

28544012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510 (or 508 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 26.

The square root of 28544012 is about 5342.6596372968. The cubic root of 28544012 is about 305.6128928115.

Adding to 28544012 its reverse (21044582), we get a palindrome (49588594).

The spelling of 28544012 in words is "twenty-eight million, five hundred forty-four thousand, twelve".