26728428 has 12 divisors (see below), whose sum is σ = 62366360. Its totient is φ = 8909472.

The previous prime is 26728423. The next prime is 26728441. The reversal of 26728428 is 82482762.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (26728423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1113673 + ... + 1113696.

Almost surely, 2^26728428 is an apocalyptic number.

It is an amenable number.

26728428 is an abundant number, since it is smaller than the sum of its proper divisors (35637932).

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

26728428 is a wasteful number, since it uses less digits than its factorization.

26728428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2227376 (or 2227374 counting only the distinct ones).

The product of its digits is 86016, while the sum is 39.

The square root of 26728428 is about 5169.9543518294. The cubic root of 26728428 is about 298.9907865455.

The spelling of 26728428 in words is "twenty-six million, seven hundred twenty-eight thousand, four hundred twenty-eight".