27531012 has 12 divisors (see below), whose sum is σ = 64239056. Its totient is φ = 9177000.

The previous prime is 27530999. The next prime is 27531013. The reversal of 27531012 is 21013572.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 27531012.

It is not an unprimeable number, because it can be changed into a prime (27531013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1147114 + ... + 1147137.

Almost surely, 2^27531012 is an apocalyptic number.

It is an amenable number.

27531012 is an abundant number, since it is smaller than the sum of its proper divisors (36708044).

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

27531012 is a wasteful number, since it uses less digits than its factorization.

27531012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2294258 (or 2294256 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 27531012 is about 5247.0002858776. Note that the first 3 decimals coincide. The cubic root of 27531012 is about 301.9539569881.

Adding to 27531012 its reverse (21013572), we get a palindrome (48544584).

The spelling of 27531012 in words is "twenty-seven million, five hundred thirty-one thousand, twelve".