27891264 has 28 divisors (see below), whose sum is σ = 73796144. Its totient is φ = 9297024.

The previous prime is 27891239. The next prime is 27891277. The reversal of 27891264 is 46219872.

It is a super-3 number, since 3×27891264³ (a number of 23 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72442 + ... + 72825.

Almost surely, 2^27891264 is an apocalyptic number.

27891264 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

27891264 is an abundant number, since it is smaller than the sum of its proper divisors (45904880).

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

27891264 is a wasteful number, since it uses less digits than its factorization.

27891264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145282 (or 145272 counting only the distinct ones).

The product of its digits is 48384, while the sum is 39.

The square root of 27891264 is about 5281.2180413234. The cubic root of 27891264 is about 303.2653080428.

The spelling of 27891264 in words is "twenty-seven million, eight hundred ninety-one thousand, two hundred sixty-four".