2190312 has 48 divisors (see below), whose sum is σ = 6142500. Its totient is φ = 704256.

The previous prime is 2190311. The next prime is 2190317. The reversal of 2190312 is 2130912.

It is a happy number.

2190312 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2056356 + 133956 = 1434^2 + 366^2 .

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

It is not an unprimeable number, because it can be changed into a prime (2190311) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1564 + ... + 2612.

2^2190312 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 2190312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3071250).

2190312 is an abundant number, since it is smaller than the sum of its proper divisors (3952188).

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

2190312 is a wasteful number, since it uses less digits than its factorization.

2190312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1090 (or 1083 counting only the distinct ones).

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

The square root of 2190312 is about 1479.9702699717. The cubic root of 2190312 is about 129.8679527036.

The spelling of 2190312 in words is "two million, one hundred ninety thousand, three hundred twelve".