27428405 has 8 divisors (see below), whose sum is σ = 33331200. Its totient is φ = 21664656.

The previous prime is 27428383. The next prime is 27428411. The reversal of 27428405 is 50482472.

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 27428405 - 2⁶ = 27428341 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34325 + ... + 35114.

It is an arithmetic number, because the mean of its divisors is an integer number (4166400).

Almost surely, 2^27428405 is an apocalyptic number.

It is an amenable number.

27428405 is a deficient number, since it is larger than the sum of its proper divisors (5902795).

27428405 is an equidigital number, since it uses as much as digits as its factorization.

27428405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69523.

The product of its (nonzero) digits is 17920, while the sum is 32.

The square root of 27428405 is about 5237.2134766496. The cubic root of 27428405 is about 301.5783664860.

The spelling of 27428405 in words is "twenty-seven million, four hundred twenty-eight thousand, four hundred five".