27542638 has 16 divisors (see below), whose sum is σ = 43371936. Its totient is φ = 13092640.

The previous prime is 27542633. The next prime is 27542651. The reversal of 27542638 is 83624572.

It is a junction number, because it is equal to n+sod(n) for n = 27542597 and 27542606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27542633) 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, 6228 + ... + 9688.

It is an arithmetic number, because the mean of its divisors is an integer number (2710746).

Almost surely, 2^27542638 is an apocalyptic number.

27542638 is a deficient number, since it is larger than the sum of its proper divisors (15829298).

27542638 is a wasteful number, since it uses less digits than its factorization.

27542638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3659.

The product of its digits is 80640, while the sum is 37.

The square root of 27542638 is about 5248.1080400464. The cubic root of 27542638 is about 301.9964547922.

The spelling of 27542638 in words is "twenty-seven million, five hundred forty-two thousand, six hundred thirty-eight".