28344012 has 12 divisors (see below), whose sum is σ = 66136056. Its totient is φ = 9448000.

The previous prime is 28344011. The next prime is 28344031. The reversal of 28344012 is 21044382.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×28344012² = 1606766032512288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28344011) 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, 1180989 + ... + 1181012.

It is an arithmetic number, because the mean of its divisors is an integer number (5511338).

Almost surely, 2^28344012 is an apocalyptic number.

It is an amenable number.

28344012 is an abundant number, since it is smaller than the sum of its proper divisors (37792044).

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

28344012 is a wasteful number, since it uses less digits than its factorization.

28344012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2362008 (or 2362006 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 28344012 is about 5323.9094657967. The cubic root of 28344012 is about 304.8974375209.

Adding to 28344012 its reverse (21044382), we get a palindrome (49388394).

The spelling of 28344012 in words is "twenty-eight million, three hundred forty-four thousand, twelve".