28067712 has 64 divisors (see below), whose sum is σ = 78499200. Its totient is φ = 8861184.

The previous prime is 28067701. The next prime is 28067713. The reversal of 28067712 is 21776082.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28067713) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5373 + ... + 9219.

It is an arithmetic number, because the mean of its divisors is an integer number (1226550).

Almost surely, 2^28067712 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 28067712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39249600).

28067712 is an abundant number, since it is smaller than the sum of its proper divisors (50431488).

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

28067712 is a wasteful number, since it uses less digits than its factorization.

28067712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3883 (or 3871 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 28067712 is about 5297.8969412400. The cubic root of 28067712 is about 303.9034781289.

The spelling of 28067712 in words is "twenty-eight million, sixty-seven thousand, seven hundred twelve".