27021138 has 16 divisors (see below), whose sum is σ = 54548640. Its totient is φ = 8922656.

The previous prime is 27021131. The next prime is 27021179. The reversal of 27021138 is 83112072.

It is not an unprimeable number, because it can be changed into a prime (27021131) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 20403 + ... + 21686.

It is an arithmetic number, because the mean of its divisors is an integer number (3409290).

Almost surely, 2^27021138 is an apocalyptic number.

27021138 is an abundant number, since it is smaller than the sum of its proper divisors (27527502).

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

27021138 is a wasteful number, since it uses less digits than its factorization.

27021138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42201.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 27021138 is about 5198.1860297608. The cubic root of 27021138 is about 300.0782684673.

The spelling of 27021138 in words is "twenty-seven million, twenty-one thousand, one hundred thirty-eight".