27981726 has 8 divisors (see below), whose sum is σ = 55963464. Its totient is φ = 9327240.

The previous prime is 27981697. The next prime is 27981727. The reversal of 27981726 is 62718972.

It is a sphenic number, since it is the product of 3 distinct primes.

27981726 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27981727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2331805 + ... + 2331816.

It is an arithmetic number, because the mean of its divisors is an integer number (6995433).

Almost surely, 2^27981726 is an apocalyptic number.

27981726 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

27981726 is a wasteful number, since it uses less digits than its factorization.

27981726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4663626.

The product of its digits is 84672, while the sum is 42.

The square root of 27981726 is about 5289.7756096077. The cubic root of 27981726 is about 303.5928225410.

The spelling of 27981726 in words is "twenty-seven million, nine hundred eighty-one thousand, seven hundred twenty-six".