27928913 has 8 divisors (see below), whose sum is σ = 28788480. Its totient is φ = 27077920.

The previous prime is 27928903. The next prime is 27928937. The reversal of 27928913 is 31982972.

It is a happy number.

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 27928913 - 2⁸ = 27928657 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27928903) by changing a digit.

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, 4808 + ... + 8886.

It is an arithmetic number, because the mean of its divisors is an integer number (3598560).

Almost surely, 2^27928913 is an apocalyptic number.

It is an amenable number.

27928913 is a deficient number, since it is larger than the sum of its proper divisors (859567).

27928913 is a wasteful number, since it uses less digits than its factorization.

27928913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4287.

The product of its digits is 54432, while the sum is 41.

The square root of 27928913 is about 5284.7812632123. The cubic root of 27928913 is about 303.4017008344.

It can be divided in two parts, 279 and 28913, that added together give a palindrome (29192).

The spelling of 27928913 in words is "twenty-seven million, nine hundred twenty-eight thousand, nine hundred thirteen".