27640534 has 8 divisors (see below), whose sum is σ = 41787648. Its totient is φ = 13711320.

The previous prime is 27640523. The next prime is 27640541. The reversal of 27640534 is 43504672.

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

It is a junction number, because it is equal to n+sod(n) for n = 27640496 and 27640505.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54157 + ... + 54664.

It is an arithmetic number, because the mean of its divisors is an integer number (5223456).

Almost surely, 2^27640534 is an apocalyptic number.

27640534 is a deficient number, since it is larger than the sum of its proper divisors (14147114).

27640534 is a wasteful number, since it uses less digits than its factorization.

27640534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108950.

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 27640534 is about 5257.4265567861. The cubic root of 27640534 is about 302.3538314383.

The spelling of 27640534 in words is "twenty-seven million, six hundred forty thousand, five hundred thirty-four".