28344912 has 80 divisors (see below), whose sum is σ = 77518848. Its totient is φ = 8910720.

The previous prime is 28344907. The next prime is 28344917. The reversal of 28344912 is 21944382.

It is an interprime number because it is at equal distance from previous prime (28344907) and next prime (28344917).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28344917) 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, 63763 + ... + 64205.

Almost surely, 2^28344912 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 28344912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38759424).

28344912 is an abundant number, since it is smaller than the sum of its proper divisors (49173936).

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

28344912 is a wasteful number, since it uses less digits than its factorization.

28344912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528 (or 522 counting only the distinct ones).

The product of its digits is 13824, while the sum is 33.

The square root of 28344912 is about 5323.9939894782. The cubic root of 28344912 is about 304.9006645962.

The spelling of 28344912 in words is "twenty-eight million, three hundred forty-four thousand, nine hundred twelve".