26638020 has 72 divisors (see below), whose sum is σ = 81821376. Its totient is φ = 7013952.

The previous prime is 26638009. The next prime is 26638063. The reversal of 26638020 is 2083662.

26638020 is a `hidden beast` number, since 2 + 6 + 638 + 0 + 20 = 666.

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 23 ways as a sum of consecutive naturals, for example, 14049 + ... + 15831.

It is an arithmetic number, because the mean of its divisors is an integer number (1136408).

Almost surely, 2^26638020 is an apocalyptic number.

26638020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26638020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40910688).

26638020 is an abundant number, since it is smaller than the sum of its proper divisors (55183356).

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

26638020 is a wasteful number, since it uses less digits than its factorization.

26638020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1881 (or 1876 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 26638020 is about 5161.2033480575. The cubic root of 26638020 is about 298.6532970161.

The spelling of 26638020 in words is "twenty-six million, six hundred thirty-eight thousand, twenty".