27447680 has 64 divisors (see below), whose sum is σ = 70686000. Its totient is φ = 10131456.

The previous prime is 27447649. The next prime is 27447683. The reversal of 27447680 is 8674472.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27447683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6671 + ... + 9969.

Almost surely, 2^27447680 is an apocalyptic number.

27447680 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 27447680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35343000).

27447680 is an abundant number, since it is smaller than the sum of its proper divisors (43238320).

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

27447680 is a wasteful number, since it uses less digits than its factorization.

27447680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3331 (or 3319 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 38.

The square root of 27447680 is about 5239.0533496043. The cubic root of 27447680 is about 301.6489935347.

The spelling of 27447680 in words is "twenty-seven million, four hundred forty-seven thousand, six hundred eighty".