28026912 has 48 divisors (see below), whose sum is σ = 74142432. Its totient is φ = 9269760.

The previous prime is 28026907. The next prime is 28026913. The reversal of 28026912 is 21962082.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 28026912.

It is not an unprimeable number, because it can be changed into a prime (28026913) 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, 12087 + ... + 14217.

It is an arithmetic number, because the mean of its divisors is an integer number (1544634).

Almost surely, 2^28026912 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 28026912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37071216).

28026912 is an abundant number, since it is smaller than the sum of its proper divisors (46115520).

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

28026912 is a wasteful number, since it uses less digits than its factorization.

28026912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2281 (or 2273 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 28026912 is about 5294.0449563637. The cubic root of 28026912 is about 303.7561525621.

Adding to 28026912 its reverse (21962082), we get a palindrome (49988994).

The spelling of 28026912 in words is "twenty-eight million, twenty-six thousand, nine hundred twelve".