28026648 has 96 divisors (see below), whose sum is σ = 84848400. Its totient is φ = 8615808.

The previous prime is 28026643. The next prime is 28026679. The reversal of 28026648 is 84662082.

28026648 is a `hidden beast` number, since 2 + 8 + 0 + 2 + 6 + 648 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28026641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24718 + ... + 25826.

Almost surely, 2^28026648 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 28026648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42424200).

28026648 is an abundant number, since it is smaller than the sum of its proper divisors (56821752).

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

28026648 is a wasteful number, since it uses less digits than its factorization.

28026648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1143 (or 1127 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 28026648 is about 5294.0200226293. The cubic root of 28026648 is about 303.7551988136.

The spelling of 28026648 in words is "twenty-eight million, twenty-six thousand, six hundred forty-eight".