27664538 has 16 divisors (see below), whose sum is σ = 47238336. Its totient is φ = 12027840.

The previous prime is 27664453. The next prime is 27664541. The reversal of 27664538 is 83546672.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 27664495 and 27664504.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26831 + ... + 27842.

It is an arithmetic number, because the mean of its divisors is an integer number (2952396).

Almost surely, 2^27664538 is an apocalyptic number.

27664538 is a deficient number, since it is larger than the sum of its proper divisors (19573798).

27664538 is a wasteful number, since it uses less digits than its factorization.

27664538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54709.

The product of its digits is 241920, while the sum is 41.

The square root of 27664538 is about 5259.7089273077. The cubic root of 27664538 is about 302.4413309712.

The spelling of 27664538 in words is "twenty-seven million, six hundred sixty-four thousand, five hundred thirty-eight".