27838690 has 32 divisors (see below), whose sum is σ = 57884544. Its totient is φ = 9527040.

The previous prime is 27838669. The next prime is 27838691. The reversal of 27838690 is 9683872.

It is a super-2 number, since 2×27838690² = 1549985321832200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27838691) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 5574 + ... + 9313.

It is an arithmetic number, because the mean of its divisors is an integer number (1808892).

Almost surely, 2^27838690 is an apocalyptic number.

27838690 is an abundant number, since it is smaller than the sum of its proper divisors (30045854).

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

27838690 is a wasteful number, since it uses less digits than its factorization.

27838690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14922.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 27838690 is about 5276.2382432942. The cubic root of 27838690 is about 303.0746402328.

The spelling of 27838690 in words is "twenty-seven million, eight hundred thirty-eight thousand, six hundred ninety".