28319712 has 24 divisors (see below), whose sum is σ = 74339496. Its totient is φ = 9439872.

The previous prime is 28319701. The next prime is 28319719. The reversal of 28319712 is 21791382.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28319719) 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, 147403 + ... + 147594.

It is an arithmetic number, because the mean of its divisors is an integer number (3097479).

Almost surely, 2^28319712 is an apocalyptic number.

It is an amenable number.

28319712 is an abundant number, since it is smaller than the sum of its proper divisors (46019784).

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

28319712 is a wasteful number, since it uses less digits than its factorization.

28319712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295010 (or 295002 counting only the distinct ones).

The product of its digits is 6048, while the sum is 33.

The square root of 28319712 is about 5321.6268189342. The cubic root of 28319712 is about 304.8102806516.

The spelling of 28319712 in words is "twenty-eight million, three hundred nineteen thousand, seven hundred twelve".