27861012 has 36 divisors (see below), whose sum is σ = 71483776. Its totient is φ = 9147600.

The previous prime is 27861007. The next prime is 27861013. The reversal of 27861012 is 21016872.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27861013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3364 + ... + 8187.

Almost surely, 2^27861012 is an apocalyptic number.

It is an amenable number.

27861012 is an abundant number, since it is smaller than the sum of its proper divisors (43622764).

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

27861012 is a wasteful number, since it uses less digits than its factorization.

27861012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11628 (or 11623 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 27861012 is about 5278.3531522626. The cubic root of 27861012 is about 303.1556237456.

Adding to 27861012 its reverse (21016872), we get a palindrome (48877884).

The spelling of 27861012 in words is "twenty-seven million, eight hundred sixty-one thousand, twelve".