27789540 has 48 divisors (see below), whose sum is σ = 80498880. Its totient is φ = 7154560.

The previous prime is 27789527. The next prime is 27789557. The reversal of 27789540 is 4598772.

It is a junction number, because it is equal to n+sod(n) for n = 27789492 and 27789501.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6246 + ... + 9725.

It is an arithmetic number, because the mean of its divisors is an integer number (1677060).

Almost surely, 2^27789540 is an apocalyptic number.

27789540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27789540 is an abundant number, since it is smaller than the sum of its proper divisors (52709340).

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

27789540 is a wasteful number, since it uses less digits than its factorization.

27789540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16012 (or 16010 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 27789540 is about 5271.5785112241. The cubic root of 27789540 is about 302.8961728590.

The spelling of 27789540 in words is "twenty-seven million, seven hundred eighty-nine thousand, five hundred forty".