28334012 has 48 divisors (see below), whose sum is σ = 58871232. Its totient is φ = 11681280.

The previous prime is 28334011. The next prime is 28334017. The reversal of 28334012 is 21043382.

It is a super-2 number, since 2×28334012² = 1605632472032288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28334011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90368 + ... + 90680.

It is an arithmetic number, because the mean of its divisors is an integer number (1226484).

Almost surely, 2^28334012 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 28334012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29435616).

28334012 is an abundant number, since it is smaller than the sum of its proper divisors (30537220).

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

28334012 is a wasteful number, since it uses less digits than its factorization.

28334012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438 (or 436 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 28334012 is about 5322.9702234749. The cubic root of 28334012 is about 304.8615765306.

Adding to 28334012 its reverse (21043382), we get a palindrome (49377394).

The spelling of 28334012 in words is "twenty-eight million, three hundred thirty-four thousand, twelve".