2168938 has 4 divisors (see below), whose sum is σ = 3253410. Its totient is φ = 1084468.

The previous prime is 2168921. The next prime is 2168951. The reversal of 2168938 is 8398612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1750329 + 418609 = 1323^2 + 647^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2168897 and 2168906.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 542233 + ... + 542236.

2^2168938 is an apocalyptic number.

2168938 is a deficient number, since it is larger than the sum of its proper divisors (1084472).

2168938 is a wasteful number, since it uses less digits than its factorization.

2168938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1084471.

The product of its digits is 20736, while the sum is 37.

The square root of 2168938 is about 1472.7314758638. The cubic root of 2168938 is about 129.4441354527. Note that the first 3 decimals are identical.

The spelling of 2168938 in words is "two million, one hundred sixty-eight thousand, nine hundred thirty-eight".