2196990 has 64 divisors (see below), whose sum is σ = 5990400. Its totient is φ = 572832.

The previous prime is 2196979. The next prime is 2197021. The reversal of 2196990 is 996912.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21279 + ... + 21381.

It is an arithmetic number, because the mean of its divisors is an integer number (93600).

2^2196990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2196990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2995200).

2196990 is an abundant number, since it is smaller than the sum of its proper divisors (3793410).

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

2196990 is a wasteful number, since it uses less digits than its factorization.

2196990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198 (or 192 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 2196990 is about 1482.2246793250. The cubic root of 2196990 is about 129.9998027610. Note that the first 3 decimals are identical.

The spelling of 2196990 in words is "two million, one hundred ninety-six thousand, nine hundred ninety".