27729012 has 12 divisors (see below), whose sum is σ = 64701056. Its totient is φ = 9243000.

The previous prime is 27728993. The next prime is 27729029. The reversal of 27729012 is 21092772.

It is a happy number.

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

It is a super-2 number, since 2×27729012² = 1537796212992288, which contains 22 as substring.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 1155364 + ... + 1155387.

Almost surely, 2^27729012 is an apocalyptic number.

It is an amenable number.

27729012 is an abundant number, since it is smaller than the sum of its proper divisors (36972044).

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

27729012 is a wasteful number, since it uses less digits than its factorization.

27729012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2310758 (or 2310756 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 30.

The square root of 27729012 is about 5265.8344068153. The cubic root of 27729012 is about 302.6761017283.

The spelling of 27729012 in words is "twenty-seven million, seven hundred twenty-nine thousand, twelve".