26638830 has 96 divisors (see below), whose sum is σ = 76624704. Its totient is φ = 6386688.

The previous prime is 26638823. The next prime is 26638841. The reversal of 26638830 is 3883662.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 34812 + ... + 35568.

It is an arithmetic number, because the mean of its divisors is an integer number (798174).

Almost surely, 2^26638830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26638830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38312352).

26638830 is an abundant number, since it is smaller than the sum of its proper divisors (49985874).

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

26638830 is a wasteful number, since it uses less digits than its factorization.

26638830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810 (or 807 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 26638830 is about 5161.2818175333. The cubic root of 26638830 is about 298.6563241020.

The spelling of 26638830 in words is "twenty-six million, six hundred thirty-eight thousand, eight hundred thirty".