26991552 has 168 divisors, whose sum is σ = 88026240. Its totient is φ = 7257600.

The previous prime is 26991551. The next prime is 26991557. The reversal of 26991552 is 25519962.

It is a tau number, because it is divible by the number of its divisors (168).

It is a self number, because there is not a number n which added to its sum of digits gives 26991552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26991551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 178677 + ... + 178827.

Almost surely, 2^26991552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26991552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44013120).

26991552 is an abundant number, since it is smaller than the sum of its proper divisors (61034688).

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

26991552 is a wasteful number, since it uses less digits than its factorization.

26991552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199 (or 182 counting only the distinct ones).

The product of its digits is 48600, while the sum is 39.

The square root of 26991552 is about 5195.3394499301. The cubic root of 26991552 is about 299.9687078472.

The spelling of 26991552 in words is "twenty-six million, nine hundred ninety-one thousand, five hundred fifty-two".