2190006 has 72 divisors (see below), whose sum is σ = 5975424. Its totient is φ = 574560.

The previous prime is 2189989. The next prime is 2190017. The reversal of 2190006 is 6000912.

2190006 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2190006² = 9592252560072, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 11371 + ... + 11561.

It is an arithmetic number, because the mean of its divisors is an integer number (82992).

2^2190006 is an apocalyptic number.

2190006 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 2190006, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2987712).

2190006 is an abundant number, since it is smaller than the sum of its proper divisors (3785418).

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

2190006 is a wasteful number, since it uses less digits than its factorization.

2190006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226 (or 216 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 2190006 is about 1479.8668859056. The cubic root of 2190006 is about 129.8619046392.

Adding to 2190006 its reverse (6000912), we get a palindrome (8190918).

The spelling of 2190006 in words is "two million, one hundred ninety thousand, six".