26642320 has 20 divisors (see below), whose sum is σ = 61943580. Its totient is φ = 10656896.

The previous prime is 26642293. The next prime is 26642323. The reversal of 26642320 is 2324662.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20939776 + 5702544 = 4576^2 + 2388^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (26642323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166435 + ... + 166594.

It is an arithmetic number, because the mean of its divisors is an integer number (3097179).

Almost surely, 2^26642320 is an apocalyptic number.

26642320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26642320 is an abundant number, since it is smaller than the sum of its proper divisors (35301260).

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

26642320 is a wasteful number, since it uses less digits than its factorization.

26642320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333042 (or 333036 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 26642320 is about 5161.6199007676. The cubic root of 26642320 is about 298.6693660293.

Adding to 26642320 its reverse (2324662), we get a palindrome (28966982).

It can be divided in two parts, 26642 and 320, that added together give a palindrome (26962).

The spelling of 26642320 in words is "twenty-six million, six hundred forty-two thousand, three hundred twenty".