2197768 has 24 divisors (see below), whose sum is σ = 4354830. Its totient is φ = 1039680.

The previous prime is 2197759. The next prime is 2197771. The reversal of 2197768 is 8677912.

It can be written as a sum of positive squares in only one way, i.e., 2196324 + 1444 = 1482^2 + 38^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2197768.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2508 + ... + 3268.

2^2197768 is an apocalyptic number.

It is an amenable number.

2197768 is a deficient number, since it is larger than the sum of its proper divisors (2157062).

2197768 is a wasteful number, since it uses less digits than its factorization.

2197768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805 (or 782 counting only the distinct ones).

The product of its digits is 42336, while the sum is 40.

The square root of 2197768 is about 1482.4870994380. The cubic root of 2197768 is about 130.0151461643.

The spelling of 2197768 in words is "two million, one hundred ninety-seven thousand, seven hundred sixty-eight".