27243540 has 120 divisors (see below), whose sum is σ = 87085152. Its totient is φ = 7128000.

The previous prime is 27243533. The next prime is 27243551. The reversal of 27243540 is 4534272.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 108415 + ... + 108665.

Almost surely, 2^27243540 is an apocalyptic number.

27243540 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 27243540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43542576).

27243540 is an abundant number, since it is smaller than the sum of its proper divisors (59841612).

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

27243540 is a wasteful number, since it uses less digits than its factorization.

27243540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339 (or 328 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 27.

The square root of 27243540 is about 5219.5344619995. The cubic root of 27243540 is about 300.8993014957.

The spelling of 27243540 in words is "twenty-seven million, two hundred forty-three thousand, five hundred forty".