26728320 has 64 divisors (see below), whose sum is σ = 85202640. Its totient is φ = 7127040.

The previous prime is 26728291. The next prime is 26728333. The reversal of 26728320 is 2382762.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5041 + ... + 8880.

Almost surely, 2^26728320 is an apocalyptic number.

26728320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26728320 is an abundant number, since it is smaller than the sum of its proper divisors (58474320).

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

26728320 is a wasteful number, since it uses less digits than its factorization.

26728320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13943 (or 13931 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 26728320 is about 5169.9439068524. The cubic root of 26728320 is about 298.9903838401.

The spelling of 26728320 in words is "twenty-six million, seven hundred twenty-eight thousand, three hundred twenty".