27818868 has 216 divisors, whose sum is σ = 91699776. Its totient is φ = 6504960.

The previous prime is 27818863. The next prime is 27818887. The reversal of 27818868 is 86881872.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27818863) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1209505 + ... + 1209527.

It is an arithmetic number, because the mean of its divisors is an integer number (424536).

Almost surely, 2^27818868 is an apocalyptic number.

27818868 is a gapful number since it is divisible by the number (28) 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 27818868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45849888).

27818868 is an abundant number, since it is smaller than the sum of its proper divisors (63880908).

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

27818868 is a wasteful number, since it uses less digits than its factorization.

27818868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83 (or 63 counting only the distinct ones).

The product of its digits is 344064, while the sum is 48.

The square root of 27818868 is about 5274.3594871795. The cubic root of 27818868 is about 303.0026903442.

The spelling of 27818868 in words is "twenty-seven million, eight hundred eighteen thousand, eight hundred sixty-eight".