27129492 has 144 divisors (see below), whose sum is σ = 81332160. Its totient is φ = 7838208.

The previous prime is 27129491. The next prime is 27129493. The reversal of 27129492 is 29492172.

It is an interprime number because it is at equal distance from previous prime (27129491) and next prime (27129493).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27129491) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 240028 + ... + 240140.

Almost surely, 2^27129492 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27129492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40666080).

27129492 is an abundant number, since it is smaller than the sum of its proper divisors (54202668).

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

27129492 is a wasteful number, since it uses less digits than its factorization.

27129492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164 (or 150 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 27129492 is about 5208.5978919475. The cubic root of 27129492 is about 300.4788353158.

The spelling of 27129492 in words is "twenty-seven million, one hundred twenty-nine thousand, four hundred ninety-two".