26889438720 has 80 divisors (see below), whose sum is σ = 85962198960. Its totient is φ = 7170514944.

The previous prime is 26889438707. The next prime is 26889438739. The reversal of 26889438720 is 2783498862.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1742935 + ... + 1758294.

It is an arithmetic number, because the mean of its divisors is an integer number (1074527487).

Almost surely, 2^26889438720 is an apocalyptic number.

26889438720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26889438720 is an abundant number, since it is smaller than the sum of its proper divisors (59072760240).

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

26889438720 is an equidigital number, since it uses as much as digits as its factorization.

26889438720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3501255 (or 3501239 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 57.

The spelling of 26889438720 in words is "twenty-six billion, eight hundred eighty-nine million, four hundred thirty-eight thousand, seven hundred twenty".