2190678 has 32 divisors (see below), whose sum is σ = 5127936. Its totient is φ = 610848.

The previous prime is 2190653. The next prime is 2190679. The reversal of 2190678 is 8760912.

2190678 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2190679) 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 15 ways as a sum of consecutive naturals, for example, 1200 + ... + 2412.

It is an arithmetic number, because the mean of its divisors is an integer number (160248).

2^2190678 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2190678, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2563968).

2190678 is an abundant number, since it is smaller than the sum of its proper divisors (2937258).

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

2190678 is a wasteful number, since it uses less digits than its factorization.

2190678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1268.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 2190678 is about 1480.0939159391. The cubic root of 2190678 is about 129.8751859232.

The spelling of 2190678 in words is "two million, one hundred ninety thousand, six hundred seventy-eight".