26805038400 has 1176 divisors, whose sum is σ = 117045435200. Its totient is φ = 6035420160.

The previous prime is 26805038387. The next prime is 26805038431. The reversal of 26805038400 is 483050862.

It is a tau number, because it is divible by the number of its divisors (1176).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 167 ways as a sum of consecutive naturals, for example, 400075167 + ... + 400075233.

Almost surely, 2^26805038400 is an apocalyptic number.

26805038400 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 26805038400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58522717600).

26805038400 is an abundant number, since it is smaller than the sum of its proper divisors (90240396800).

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

26805038400 is an frugal number, since it uses more digits than its factorization.

26805038400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The spelling of 26805038400 in words is "twenty-six billion, eight hundred five million, thirty-eight thousand, four hundred".