27045780 has 48 divisors (see below), whose sum is σ = 76495104. Its totient is φ = 7139200.

The previous prime is 27045757. The next prime is 27045787. The reversal of 27045780 is 8754072.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27045787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3829 + ... + 8291.

It is an arithmetic number, because the mean of its divisors is an integer number (1593648).

Almost surely, 2^27045780 is an apocalyptic number.

27045780 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 27045780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38247552).

27045780 is an abundant number, since it is smaller than the sum of its proper divisors (49449324).

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

27045780 is a wasteful number, since it uses less digits than its factorization.

27045780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4576 (or 4574 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 33.

The square root of 27045780 is about 5200.5557395340. Note that the first 3 decimals coincide. The cubic root of 27045780 is about 300.1694598154.

The spelling of 27045780 in words is "twenty-seven million, forty-five thousand, seven hundred eighty".