27855740 has 48 divisors (see below), whose sum is σ = 65046240. Its totient is φ = 9934080.

The previous prime is 27855733. The next prime is 27855761. The reversal of 27855740 is 4755872.

It is a super-3 number, since 3×27855740³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 27855694 and 27855703.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10466 + ... + 12854.

It is an arithmetic number, because the mean of its divisors is an integer number (1355130).

Almost surely, 2^27855740 is an apocalyptic number.

27855740 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 27855740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32523120).

27855740 is an abundant number, since it is smaller than the sum of its proper divisors (37190500).

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

27855740 is a wasteful number, since it uses less digits than its factorization.

27855740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2462 (or 2460 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 38.

The square root of 27855740 is about 5277.8537304476. The cubic root of 27855740 is about 303.1365009984.

The spelling of 27855740 in words is "twenty-seven million, eight hundred fifty-five thousand, seven hundred forty".