28029312 has 96 divisors (see below), whose sum is σ = 83538000. Its totient is φ = 9010176.

The previous prime is 28029289. The next prime is 28029347. The reversal of 28029312 is 21392082.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 32989 + ... + 33827.

Almost surely, 2^28029312 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 28029312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41769000).

28029312 is an abundant number, since it is smaller than the sum of its proper divisors (55508688).

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

28029312 is a wasteful number, since it uses less digits than its factorization.

28029312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888 (or 873 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 28029312 is about 5294.2716212903. The cubic root of 28029312 is about 303.7648227284.

It can be divided in two parts, 280 and 29312, that added together give a palindrome (29592).

The spelling of 28029312 in words is "twenty-eight million, twenty-nine thousand, three hundred twelve".