27042540 has 144 divisors (see below), whose sum is σ = 90752256. Its totient is φ = 5892480.

The previous prime is 27042539. The next prime is 27042557. The reversal of 27042540 is 4524072.

It is a self number, because there is not a number n which added to its sum of digits gives 27042540.

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 47 ways as a sum of consecutive naturals, for example, 403587 + ... + 403653.

It is an arithmetic number, because the mean of its divisors is an integer number (630224).

Almost surely, 2^27042540 is an apocalyptic number.

27042540 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 27042540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45376128).

27042540 is an abundant number, since it is smaller than the sum of its proper divisors (63709716).

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

27042540 is a wasteful number, since it uses less digits than its factorization.

27042540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148 (or 115 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 24.

The square root of 27042540 is about 5200.2442250341. The cubic root of 27042540 is about 300.1574728821.

The spelling of 27042540 in words is "twenty-seven million, forty-two thousand, five hundred forty".