26938821 has 32 divisors (see below), whose sum is σ = 44690688. Its totient is φ = 14054400.

The previous prime is 26938817. The next prime is 26938841. The reversal of 26938821 is 12883962.

26938821 = 260² + 261² + ... + 461².

It is a happy number.

It is not a de Polignac number, because 26938821 - 2² = 26938817 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 26938821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26938841) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 27085 + ... + 28061.

It is an arithmetic number, because the mean of its divisors is an integer number (1396584).

Almost surely, 2^26938821 is an apocalyptic number.

26938821 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

26938821 is a deficient number, since it is larger than the sum of its proper divisors (17751867).

26938821 is a wasteful number, since it uses less digits than its factorization.

26938821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1101.

The product of its digits is 41472, while the sum is 39.

The square root of 26938821 is about 5190.2621321086. The cubic root of 26938821 is about 299.7732397536.

The spelling of 26938821 in words is "twenty-six million, nine hundred thirty-eight thousand, eight hundred twenty-one".