27129340 has 144 divisors (see below), whose sum is σ = 73543680. Its totient is φ = 8346240.

The previous prime is 27129299. The next prime is 27129343. The reversal of 27129340 is 4392172.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 27129299 and 27129308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27129343) 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, 577197 + ... + 577243.

It is an arithmetic number, because the mean of its divisors is an integer number (510720).

Almost surely, 2^27129340 is an apocalyptic number.

27129340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27129340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36771840).

27129340 is an abundant number, since it is smaller than the sum of its proper divisors (46414340).

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

27129340 is a wasteful number, since it uses less digits than its factorization.

27129340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120 (or 111 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 27129340 is about 5208.5833006682. The cubic root of 27129340 is about 300.4782741446.

The spelling of 27129340 in words is "twenty-seven million, one hundred twenty-nine thousand, three hundred forty".