27197840 has 40 divisors (see below), whose sum is σ = 63478080. Its totient is φ = 10837376.

The previous prime is 27197839. The next prime is 27197843. The reversal of 27197840 is 4879172.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 27197794 and 27197803.

It is not an unprimeable number, because it can be changed into a prime (27197843) 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, 28247 + ... + 29193.

It is an arithmetic number, because the mean of its divisors is an integer number (1586952).

Almost surely, 2^27197840 is an apocalyptic number.

27197840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27197840 is an abundant number, since it is smaller than the sum of its proper divisors (36280240).

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

27197840 is a wasteful number, since it uses less digits than its factorization.

27197840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1319 (or 1313 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 27197840 is about 5215.1548395038. The cubic root of 27197840 is about 300.7309582942.

The spelling of 27197840 in words is "twenty-seven million, one hundred ninety-seven thousand, eight hundred forty".