28266678 has 64 divisors (see below), whose sum is σ = 71539200. Its totient is φ = 8189280.

The previous prime is 28266647. The next prime is 28266691. The reversal of 28266678 is 87666282.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12628 + ... + 14696.

It is an arithmetic number, because the mean of its divisors is an integer number (1117800).

Almost surely, 2^28266678 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28266678, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35769600).

28266678 is an abundant number, since it is smaller than the sum of its proper divisors (43272522).

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

28266678 is a wasteful number, since it uses less digits than its factorization.

28266678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2114 (or 2108 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 28266678 is about 5316.6416091364. The cubic root of 28266678 is about 304.6198901820.

The spelling of 28266678 in words is "twenty-eight million, two hundred sixty-six thousand, six hundred seventy-eight".