26990080 has 80 divisors (see below), whose sum is σ = 69776784. Its totient is φ = 9953280.

The previous prime is 26990077. The next prime is 26990099. The reversal of 26990080 is 8009962.

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32875 + ... + 33685.

Almost surely, 2^26990080 is an apocalyptic number.

26990080 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 26990080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34888392).

26990080 is an abundant number, since it is smaller than the sum of its proper divisors (42786704).

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

26990080 is an equidigital number, since it uses as much as digits as its factorization.

26990080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847 (or 831 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 26990080 is about 5195.1977825681. The cubic root of 26990080 is about 299.9632547587.

The spelling of 26990080 in words is "twenty-six million, nine hundred ninety thousand, eighty".