27878560 has 24 divisors (see below), whose sum is σ = 65863476. Its totient is φ = 11151360.

The previous prime is 27878549. The next prime is 27878563. The reversal of 27878560 is 6587872.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 27751824 + 126736 = 5268^2 + 356^2 .

It is not an unprimeable number, because it can be changed into a prime (27878563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86961 + ... + 87280.

Almost surely, 2^27878560 is an apocalyptic number.

27878560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27878560 is an abundant number, since it is smaller than the sum of its proper divisors (37984916).

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

27878560 is a wasteful number, since it uses less digits than its factorization.

27878560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174256 (or 174248 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 43.

The square root of 27878560 is about 5280.0151514934. The cubic root of 27878560 is about 303.2192569739.

The spelling of 27878560 in words is "twenty-seven million, eight hundred seventy-eight thousand, five hundred sixty".