27491256 has 96 divisors (see below), whose sum is σ = 83734560. Its totient is φ = 8084736.

The previous prime is 27491249. The next prime is 27491273. The reversal of 27491256 is 65219472.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 27491256.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20890 + ... + 22166.

It is an arithmetic number, because the mean of its divisors is an integer number (872235).

Almost surely, 2^27491256 is an apocalyptic number.

27491256 is a gapful number since it is divisible by the number (26) 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 27491256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41867280).

27491256 is an abundant number, since it is smaller than the sum of its proper divisors (56243304).

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

27491256 is a wasteful number, since it uses less digits than its factorization.

27491256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1325 (or 1318 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 27491256 is about 5243.2104668800. The cubic root of 27491256 is about 301.8085420103.

It can be divided in two parts, 2749 and 1256, that added together give a triangular number (4005 = T₈₉).

The spelling of 27491256 in words is "twenty-seven million, four hundred ninety-one thousand, two hundred fifty-six".