27686740 has 12 divisors (see below), whose sum is σ = 58142196. Its totient is φ = 11074688.

The previous prime is 27686731. The next prime is 27686759. The reversal of 27686740 is 4768672.

It can be written as a sum of positive squares in 2 ways, for example, as 16941456 + 10745284 = 4116^2 + 3278^2 .

It is a junction number, because it is equal to n+sod(n) for n = 27686693 and 27686702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 692149 + ... + 692188.

It is an arithmetic number, because the mean of its divisors is an integer number (4845183).

Almost surely, 2^27686740 is an apocalyptic number.

27686740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27686740 is an abundant number, since it is smaller than the sum of its proper divisors (30455456).

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

27686740 is a wasteful number, since it uses less digits than its factorization.

27686740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1384346 (or 1384344 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 40.

The square root of 27686740 is about 5261.8190770873. The cubic root of 27686740 is about 302.5222167960.

The spelling of 27686740 in words is "twenty-seven million, six hundred eighty-six thousand, seven hundred forty".