27856913 has 8 divisors (see below), whose sum is σ = 31868928. Its totient is φ = 23853024.

The previous prime is 27856883. The next prime is 27856943. The reversal of 27856913 is 31965872.

It is an interprime number because it is at equal distance from previous prime (27856883) and next prime (27856943).

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 27856913 - 2¹⁰ = 27855889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27856943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10445 + ... + 12837.

It is an arithmetic number, because the mean of its divisors is an integer number (3983616).

Almost surely, 2^27856913 is an apocalyptic number.

It is an amenable number.

27856913 is a deficient number, since it is larger than the sum of its proper divisors (4012015).

27856913 is a wasteful number, since it uses less digits than its factorization.

27856913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4063.

The product of its digits is 90720, while the sum is 41.

The square root of 27856913 is about 5277.9648539944. The cubic root of 27856913 is about 303.1407559458.

The spelling of 27856913 in words is "twenty-seven million, eight hundred fifty-six thousand, nine hundred thirteen".