26881520 has 40 divisors (see below), whose sum is σ = 63369456. Its totient is φ = 10603008.

The previous prime is 26881507. The next prime is 26881529. The reversal of 26881520 is 2518862.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×26881520² = 1445232235020800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26881529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3539 + ... + 8141.

Almost surely, 2^26881520 is an apocalyptic number.

26881520 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 26881520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31684728).

26881520 is an abundant number, since it is smaller than the sum of its proper divisors (36487936).

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

26881520 is a wasteful number, since it uses less digits than its factorization.

26881520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4689 (or 4683 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 26881520 is about 5184.7391448365. The cubic root of 26881520 is about 299.5605417544.

The spelling of 26881520 in words is "twenty-six million, eight hundred eighty-one thousand, five hundred twenty".