2197664 has 24 divisors (see below), whose sum is σ = 4945248. Its totient is φ = 941760.

The previous prime is 2197651. The next prime is 2197681. The reversal of 2197664 is 4667912.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4682 + ... + 5129.

It is an arithmetic number, because the mean of its divisors is an integer number (206052).

2^2197664 is an apocalyptic number.

It is an amenable number.

2197664 is an abundant number, since it is smaller than the sum of its proper divisors (2747584).

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

2197664 is an equidigital number, since it uses as much as digits as its factorization.

2197664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9828 (or 9820 counting only the distinct ones).

The product of its digits is 18144, while the sum is 35.

The square root of 2197664 is about 1482.4520228324. The cubic root of 2197664 is about 130.0130953278.

The spelling of 2197664 in words is "two million, one hundred ninety-seven thousand, six hundred sixty-four".