27788945 has 8 divisors (see below), whose sum is σ = 34796736. Its totient is φ = 21264496.

The previous prime is 27788923. The next prime is 27788951. The reversal of 27788945 is 54988772.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27788945 - 2⁶ = 27788881 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27788893 and 27788902.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120707 + ... + 120936.

It is an arithmetic number, because the mean of its divisors is an integer number (4349592).

Almost surely, 2^27788945 is an apocalyptic number.

It is an amenable number.

27788945 is a deficient number, since it is larger than the sum of its proper divisors (7007791).

27788945 is a wasteful number, since it uses less digits than its factorization.

27788945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241671.

The product of its digits is 1128960, while the sum is 50.

The square root of 27788945 is about 5271.5220762129. The cubic root of 27788945 is about 302.8940110803.

The spelling of 27788945 in words is "twenty-seven million, seven hundred eighty-eight thousand, nine hundred forty-five".