27855000 has 120 divisors (see below), whose sum is σ = 94422900. Its totient is φ = 7416000.

The previous prime is 27854999. The next prime is 27855017. The reversal of 27855000 is 55872.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 44691 + ... + 45309.

Almost surely, 2^27855000 is an apocalyptic number.

27855000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27855000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47211450).

27855000 is an abundant number, since it is smaller than the sum of its proper divisors (66567900).

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

27855000 is a wasteful number, since it uses less digits than its factorization.

27855000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651 (or 629 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 27855000 is about 5277.7836257278. The cubic root of 27855000 is about 303.1338166564.

It can be divided in two parts, 278 and 55000, that added together give a triangular number (55278 = T₃₃₂).

The spelling of 27855000 in words is "twenty-seven million, eight hundred fifty-five thousand".