28000026 has 32 divisors (see below), whose sum is σ = 63083520. Its totient is φ = 9204192.

The previous prime is 28000019. The next prime is 28000031. The reversal of 28000026 is 62000082.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 27999972 and 28000008.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 391 + ... + 7493.

It is an arithmetic number, because the mean of its divisors is an integer number (1971360).

Almost surely, 2^28000026 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28000026, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31541760).

28000026 is an abundant number, since it is smaller than the sum of its proper divisors (35083494).

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

28000026 is a wasteful number, since it uses less digits than its factorization.

28000026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7187 (or 7181 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 28000026 is about 5291.5050788977. The cubic root of 28000026 is about 303.6589911772.

The spelling of 28000026 in words is "twenty-eight million, twenty-six", and thus it is an aban number and an uban number.