27685890 has 48 divisors (see below), whose sum is σ = 72304128. Its totient is φ = 7350048.

The previous prime is 27685849. The next prime is 27685909. The reversal of 27685890 is 9858672.

27685890 is a `hidden beast` number, since 2 + 7 + 68 + 589 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24927 + ... + 26013.

It is an arithmetic number, because the mean of its divisors is an integer number (1506336).

Almost surely, 2^27685890 is an apocalyptic number.

27685890 is an abundant number, since it is smaller than the sum of its proper divisors (44618238).

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

27685890 is a wasteful number, since it uses less digits than its factorization.

27685890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1383 (or 1380 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 27685890 is about 5261.7383059213. The cubic root of 27685890 is about 302.5191208914.

The spelling of 27685890 in words is "twenty-seven million, six hundred eighty-five thousand, eight hundred ninety".