26728830 has 24 divisors (see below), whose sum is σ = 69495192. Its totient is φ = 7127664.

The previous prime is 26728787. The next prime is 26728831. The reversal of 26728830 is 3882762.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26728831) 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 11 ways as a sum of consecutive naturals, for example, 148404 + ... + 148583.

It is an arithmetic number, because the mean of its divisors is an integer number (2895633).

Almost surely, 2^26728830 is an apocalyptic number.

26728830 is an abundant number, since it is smaller than the sum of its proper divisors (42766362).

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

26728830 is a wasteful number, since it uses less digits than its factorization.

26728830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297000 (or 296997 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 26728830 is about 5169.9932301696. The cubic root of 26728830 is about 298.9922854950.

The spelling of 26728830 in words is "twenty-six million, seven hundred twenty-eight thousand, eight hundred thirty".