2171768 has 8 divisors (see below), whose sum is σ = 4072080. Its totient is φ = 1085880.

The previous prime is 2171761. The next prime is 2171773. The reversal of 2171768 is 8671712.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2171761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 135728 + ... + 135743.

It is an arithmetic number, because the mean of its divisors is an integer number (509010).

2^2171768 is an apocalyptic number.

It is an amenable number.

2171768 is a deficient number, since it is larger than the sum of its proper divisors (1900312).

2171768 is a wasteful number, since it uses less digits than its factorization.

2171768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271477 (or 271473 counting only the distinct ones).

The product of its digits is 4704, while the sum is 32.

The square root of 2171768 is about 1473.6919623856. The cubic root of 2171768 is about 129.5004099508.

The spelling of 2171768 in words is "two million, one hundred seventy-one thousand, seven hundred sixty-eight".