27756642 has 16 divisors (see below), whose sum is σ = 56005920. Its totient is φ = 9170112.

The previous prime is 27756593. The next prime is 27756643. The reversal of 27756642 is 24665772.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 27756642.

It is not an unprimeable number, because it can be changed into a prime (27756643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19792 + ... + 21147.

It is an arithmetic number, because the mean of its divisors is an integer number (3500370).

Almost surely, 2^27756642 is an apocalyptic number.

27756642 is an abundant number, since it is smaller than the sum of its proper divisors (28249278).

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

27756642 is a wasteful number, since it uses less digits than its factorization.

27756642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41057.

The product of its digits is 141120, while the sum is 39.

The square root of 27756642 is about 5268.4572694480. The cubic root of 27756642 is about 302.7766001345.

The spelling of 27756642 in words is "twenty-seven million, seven hundred fifty-six thousand, six hundred forty-two".