27985530 has 32 divisors (see below), whose sum is σ = 67687488. Its totient is φ = 7404800.

The previous prime is 27985523. The next prime is 27985541. The reversal of 27985530 is 3558972.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 370 + ... + 7490.

It is an arithmetic number, because the mean of its divisors is an integer number (2115234).

Almost surely, 2^27985530 is an apocalyptic number.

27985530 is an abundant number, since it is smaller than the sum of its proper divisors (39701958).

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

27985530 is a wasteful number, since it uses less digits than its factorization.

27985530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7262.

The product of its (nonzero) digits is 75600, while the sum is 39.

The square root of 27985530 is about 5290.1351589539. The cubic root of 27985530 is about 303.6065793141.

The spelling of 27985530 in words is "twenty-seven million, nine hundred eighty-five thousand, five hundred thirty".