27671664 has 20 divisors (see below), whose sum is σ = 71485256. Its totient is φ = 9223872.

The previous prime is 27671647. The next prime is 27671669. The reversal of 27671664 is 46617672.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27671669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 288199 + ... + 288294.

Almost surely, 2^27671664 is an apocalyptic number.

27671664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

27671664 is an abundant number, since it is smaller than the sum of its proper divisors (43813592).

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

27671664 is a wasteful number, since it uses less digits than its factorization.

27671664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576504 (or 576498 counting only the distinct ones).

The product of its digits is 84672, while the sum is 39.

The square root of 27671664 is about 5260.3862976021. The cubic root of 27671664 is about 302.4672969678.

The spelling of 27671664 in words is "twenty-seven million, six hundred seventy-one thousand, six hundred sixty-four".