27138270 has 64 divisors (see below), whose sum is σ = 70087680. Its totient is φ = 6703488.

The previous prime is 27138263. The next prime is 27138271. The reversal of 27138270 is 7283172.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27138271) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26284 + ... + 27296.

It is an arithmetic number, because the mean of its divisors is an integer number (1095120).

Almost surely, 2^27138270 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27138270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35043840).

27138270 is an abundant number, since it is smaller than the sum of its proper divisors (42949410).

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

27138270 is a wasteful number, since it uses less digits than its factorization.

27138270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1089.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 27138270 is about 5209.4404689947. The cubic root of 27138270 is about 300.5112393971.

The spelling of 27138270 in words is "twenty-seven million, one hundred thirty-eight thousand, two hundred seventy".