26398880 has 48 divisors (see below), whose sum is σ = 62868960. Its totient is φ = 10474752.

The previous prime is 26398873. The next prime is 26398907. The reversal of 26398880 is 8889362.

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, 21647 + ... + 22833.

It is an arithmetic number, because the mean of its divisors is an integer number (1309770).

Almost surely, 2^26398880 is an apocalyptic number.

26398880 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 26398880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31434480).

26398880 is an abundant number, since it is smaller than the sum of its proper divisors (36470080).

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

26398880 is a wasteful number, since it uses less digits than its factorization.

26398880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1341 (or 1333 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 44.

The square root of 26398880 is about 5137.9840404579. The cubic root of 26398880 is about 297.7568997680.

The spelling of 26398880 in words is "twenty-six million, three hundred ninety-eight thousand, eight hundred eighty".