27197440 has 68 divisors (see below), whose sum is σ = 66059784. Its totient is φ = 10747904.

The previous prime is 27197413. The next prime is 27197461. The reversal of 27197440 is 4479172.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 27197396 and 27197405.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327639 + ... + 327721.

Almost surely, 2^27197440 is an apocalyptic number.

27197440 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 27197440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33029892).

27197440 is an abundant number, since it is smaller than the sum of its proper divisors (38862344).

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

27197440 is an frugal number, since it uses more digits than its factorization.

27197440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 27197440 is about 5215.1164895906. The cubic root of 27197440 is about 300.7294839985.

The spelling of 27197440 in words is "twenty-seven million, one hundred ninety-seven thousand, four hundred forty".