28744012 has 12 divisors (see below), whose sum is σ = 54875016. Its totient is φ = 13065440.

The previous prime is 28744007. The next prime is 28744057. The reversal of 28744012 is 21044782.

It is a super-2 number, since 2×28744012² = 1652436451712288, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 326593 + ... + 326680.

It is an arithmetic number, because the mean of its divisors is an integer number (4572918).

Almost surely, 2^28744012 is an apocalyptic number.

28744012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28744012 is a deficient number, since it is larger than the sum of its proper divisors (26131004).

28744012 is a wasteful number, since it uses less digits than its factorization.

28744012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653288 (or 653286 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 28744012 is about 5361.3442344248. The cubic root of 28744012 is about 306.3250138609.

Adding to 28744012 its reverse (21044782), we get a palindrome (49788794).

It can be divided in two parts, 2874 and 4012, that added together give a palindrome (6886).

The spelling of 28744012 in words is "twenty-eight million, seven hundred forty-four thousand, twelve".