27120728 has 8 divisors (see below), whose sum is σ = 50851380. Its totient is φ = 13560360.

The previous prime is 27120727. The next prime is 27120757. The reversal of 27120728 is 82702172.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 27120728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27120727) by changing a digit.

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 as a sum of consecutive naturals, namely, 1695038 + ... + 1695053.

Almost surely, 2^27120728 is an apocalyptic number.

It is an amenable number.

27120728 is a deficient number, since it is larger than the sum of its proper divisors (23730652).

27120728 is a wasteful number, since it uses less digits than its factorization.

27120728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3390097 (or 3390093 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 27120728 is about 5207.7565227265. The cubic root of 27120728 is about 300.4464759419.

The spelling of 27120728 in words is "twenty-seven million, one hundred twenty thousand, seven hundred twenty-eight".