27861798 has 8 divisors (see below), whose sum is σ = 55723608. Its totient is φ = 9287264.

The previous prime is 27861787. The next prime is 27861803. The reversal of 27861798 is 89716872.

It is a sphenic number, since it is the product of 3 distinct primes.

27861798 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2321811 + ... + 2321822.

It is an arithmetic number, because the mean of its divisors is an integer number (6965451).

Almost surely, 2^27861798 is an apocalyptic number.

27861798 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

27861798 is a wasteful number, since it uses less digits than its factorization.

27861798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4643638.

The product of its digits is 338688, while the sum is 48.

The square root of 27861798 is about 5278.4276067784. The cubic root of 27861798 is about 303.1584745404.

The spelling of 27861798 in words is "twenty-seven million, eight hundred sixty-one thousand, seven hundred ninety-eight".