2172008 has 8 divisors (see below), whose sum is σ = 4072530. Its totient is φ = 1086000.

The previous prime is 2172007. The next prime is 2172031. The reversal of 2172008 is 8002712.

It can be written as a sum of positive squares in only one way, i.e., 1684804 + 487204 = 1298^2 + 698^2 .

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

It is not an unprimeable number, because it can be changed into a prime (2172007) by changing a digit.

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 as a sum of consecutive naturals, namely, 135743 + ... + 135758.

2^2172008 is an apocalyptic number.

It is an amenable number.

2172008 is a deficient number, since it is larger than the sum of its proper divisors (1900522).

2172008 is a wasteful number, since it uses less digits than its factorization.

2172008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271507 (or 271503 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 2172008 is about 1473.7733882792. The cubic root of 2172008 is about 129.5051800972.

The spelling of 2172008 in words is "two million, one hundred seventy-two thousand, eight".