2190888 has 144 divisors (see below), whose sum is σ = 7469280. Its totient is φ = 598752.

The previous prime is 2190887. The next prime is 2190901. The reversal of 2190888 is 8880912.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2190887) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 95245 + ... + 95267.

It is an arithmetic number, because the mean of its divisors is an integer number (51870).

2^2190888 is an apocalyptic number.

2190888 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 2190888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3734640).

2190888 is an abundant number, since it is smaller than the sum of its proper divisors (5278392).

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

2190888 is a wasteful number, since it uses less digits than its factorization.

2190888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58 (or 35 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The square root of 2190888 is about 1480.1648556833. The cubic root of 2190888 is about 129.8793357675.

It can be divided in two parts, 21 and 90888, that added together give a palindrome (90909).

The spelling of 2190888 in words is "two million, one hundred ninety thousand, eight hundred eighty-eight".