27685420 has 24 divisors (see below), whose sum is σ = 66445344. Its totient is φ = 9492096.

The previous prime is 27685403. The next prime is 27685423. The reversal of 27685420 is 2458672.

It is not an unprimeable number, because it can be changed into a prime (27685423) 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, 98737 + ... + 99016.

It is an arithmetic number, because the mean of its divisors is an integer number (2768556).

Almost surely, 2^27685420 is an apocalyptic number.

27685420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27685420 is an abundant number, since it is smaller than the sum of its proper divisors (38759924).

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

27685420 is a wasteful number, since it uses less digits than its factorization.

27685420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197769 (or 197767 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 27685420 is about 5261.6936436855. The cubic root of 27685420 is about 302.5174090111.

The spelling of 27685420 in words is "twenty-seven million, six hundred eighty-five thousand, four hundred twenty".