27919797 has 16 divisors (see below), whose sum is σ = 41492160. Its totient is φ = 16595712.

The previous prime is 27919777. The next prime is 27919813. The reversal of 27919797 is 79791972.

It is not a de Polignac number, because 27919797 - 2⁷ = 27919669 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27919757) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13438 + ... + 15375.

It is an arithmetic number, because the mean of its divisors is an integer number (2593260).

Almost surely, 2^27919797 is an apocalyptic number.

It is an amenable number.

27919797 is a deficient number, since it is larger than the sum of its proper divisors (13572363).

27919797 is a wasteful number, since it uses less digits than its factorization.

27919797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28852.

The product of its digits is 500094, while the sum is 51.

The square root of 27919797 is about 5283.9187162560. The cubic root of 27919797 is about 303.3686871270.

The spelling of 27919797 in words is "twenty-seven million, nine hundred nineteen thousand, seven hundred ninety-seven".