27890238 has 8 divisors (see below), whose sum is σ = 55780488. Its totient is φ = 9296744.

The previous prime is 27890179. The next prime is 27890249. The reversal of 27890238 is 83209872.

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

27890238 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 27890196 and 27890205.

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 3 ways as a sum of consecutive naturals, for example, 2324181 + ... + 2324192.

It is an arithmetic number, because the mean of its divisors is an integer number (6972561).

Almost surely, 2^27890238 is an apocalyptic number.

27890238 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.

27890238 is a wasteful number, since it uses less digits than its factorization.

27890238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4648378.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 27890238 is about 5281.1209037476. The cubic root of 27890238 is about 303.2615893871.

The spelling of 27890238 in words is "twenty-seven million, eight hundred ninety thousand, two hundred thirty-eight".