2170868 has 48 divisors (see below), whose sum is σ = 4666368. Its totient is φ = 864000.

The previous prime is 2170829. The next prime is 2170871. The reversal of 2170868 is 8680712.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35558 + ... + 35618.

It is an arithmetic number, because the mean of its divisors is an integer number (97216).

2^2170868 is an apocalyptic number.

2170868 is a gapful number since it is divisible by the number (28) 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 2170868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2333184).

2170868 is an abundant number, since it is smaller than the sum of its proper divisors (2495500).

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

2170868 is a wasteful number, since it uses less digits than its factorization.

2170868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 2170868 is about 1473.3865752069. The cubic root of 2170868 is about 129.4825187715.

The spelling of 2170868 in words is "two million, one hundred seventy thousand, eight hundred sixty-eight".