27697140 has 144 divisors (see below), whose sum is σ = 89893440. Its totient is φ = 7153920.

The previous prime is 27697093. The next prime is 27697141. The reversal of 27697140 is 4179672.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 27697095 and 27697104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27697141) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 199191 + ... + 199329.

It is an arithmetic number, because the mean of its divisors is an integer number (624260).

Almost surely, 2^27697140 is an apocalyptic number.

27697140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27697140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44946720).

27697140 is an abundant number, since it is smaller than the sum of its proper divisors (62196300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27697140 is a wasteful number, since it uses less digits than its factorization.

27697140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204 (or 190 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 27697140 is about 5262.8072356871. The cubic root of 27697140 is about 302.5600909696.

The spelling of 27697140 in words is "twenty-seven million, six hundred ninety-seven thousand, one hundred forty".