2168490 has 48 divisors (see below), whose sum is σ = 5458464. Its totient is φ = 551040.

The previous prime is 2168483. The next prime is 2168497. The reversal of 2168490 is 948612.

It is an interprime number because it is at equal distance from previous prime (2168483) and next prime (2168497).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (2168497) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50409 + ... + 50451.

It is an arithmetic number, because the mean of its divisors is an integer number (113718).

2^2168490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2168490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2729232).

2168490 is an abundant number, since it is smaller than the sum of its proper divisors (3289974).

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

2168490 is a wasteful number, since it uses less digits than its factorization.

2168490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135 (or 94 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 2168490 is about 1472.5793696776. The cubic root of 2168490 is about 129.4352224937.

The spelling of 2168490 in words is "two million, one hundred sixty-eight thousand, four hundred ninety".