27861144 has 32 divisors (see below), whose sum is σ = 73320000. Its totient is φ = 8798112.

The previous prime is 27861139. The next prime is 27861173. The reversal of 27861144 is 44116872.

It is a congruent number.

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, 30094 + ... + 31005.

It is an arithmetic number, because the mean of its divisors is an integer number (2291250).

Almost surely, 2^27861144 is an apocalyptic number.

27861144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

27861144 is an abundant number, since it is smaller than the sum of its proper divisors (45458856).

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

27861144 is a wasteful number, since it uses less digits than its factorization.

27861144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61127 (or 61123 counting only the distinct ones).

The product of its digits is 10752, while the sum is 33.

The square root of 27861144 is about 5278.3656561477. The cubic root of 27861144 is about 303.1561025088.

The spelling of 27861144 in words is "twenty-seven million, eight hundred sixty-one thousand, one hundred forty-four".