26638920 has 288 divisors, whose sum is σ = 111533760. Its totient is φ = 5356800.

The previous prime is 26638903. The next prime is 26638939. The reversal of 26638920 is 2983662.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 859305 + ... + 859335.

It is an arithmetic number, because the mean of its divisors is an integer number (387270).

Almost surely, 2^26638920 is an apocalyptic number.

26638920 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 26638920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55766880).

26638920 is an abundant number, since it is smaller than the sum of its proper divisors (84894840).

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

26638920 is a wasteful number, since it uses less digits than its factorization.

26638920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97 (or 59 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 26638920 is about 5161.2905362903. The cubic root of 26638920 is about 298.6566604411.

The spelling of 26638920 in words is "twenty-six million, six hundred thirty-eight thousand, nine hundred twenty".