27947540 has 24 divisors (see below), whose sum is σ = 59143392. Its totient is φ = 11092640.

The previous prime is 27947501. The next prime is 27947587. The reversal of 27947540 is 4574972.

It is a junction number, because it is equal to n+sod(n) for n = 27947494 and 27947503.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2714 + ... + 7953.

It is an arithmetic number, because the mean of its divisors is an integer number (2464308).

Almost surely, 2^27947540 is an apocalyptic number.

27947540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27947540 is an abundant number, since it is smaller than the sum of its proper divisors (31195852).

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

27947540 is a wasteful number, since it uses less digits than its factorization.

27947540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10807 (or 10805 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 27947540 is about 5286.5432940628. The cubic root of 27947540 is about 303.4691364168.

The spelling of 27947540 in words is "twenty-seven million, nine hundred forty-seven thousand, five hundred forty".