27438780 has 48 divisors (see below), whose sum is σ = 77202720. Its totient is φ = 7281408.

The previous prime is 27438767. The next prime is 27438781. The reversal of 27438780 is 8783472.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27438781) 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, 12742 + ... + 14738.

It is an arithmetic number, because the mean of its divisors is an integer number (1608390).

Almost surely, 2^27438780 is an apocalyptic number.

27438780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27438780 is an abundant number, since it is smaller than the sum of its proper divisors (49763940).

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

27438780 is a wasteful number, since it uses less digits than its factorization.

27438780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2238 (or 2236 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 39.

The square root of 27438780 is about 5238.2038906480. The cubic root of 27438780 is about 301.6163864526.

The spelling of 27438780 in words is "twenty-seven million, four hundred thirty-eight thousand, seven hundred eighty".