2173908 has 48 divisors (see below), whose sum is σ = 5677056. Its totient is φ = 641760.

The previous prime is 2173907. The next prime is 2173957. The reversal of 2173908 is 8093712.

It is a happy number.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2173903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5485 + ... + 5867.

It is an arithmetic number, because the mean of its divisors is an integer number (118272).

2^2173908 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2173908, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2838528).

2173908 is an abundant number, since it is smaller than the sum of its proper divisors (3503148).

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

2173908 is a wasteful number, since it uses less digits than its factorization.

2173908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444 (or 442 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 2173908 is about 1474.4178512213. The cubic root of 2173908 is about 129.5429313591.

It can be divided in two parts, 2173 and 908, that added together give a triangular number (3081 = T₇₈).

The spelling of 2173908 in words is "two million, one hundred seventy-three thousand, nine hundred eight".