2161938 has 8 divisors (see below), whose sum is σ = 4323888. Its totient is φ = 720644.

The previous prime is 2161933. The next prime is 2161949. The reversal of 2161938 is 8391612.

It is a sphenic number, since it is the product of 3 distinct primes.

2161938 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2161933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180156 + ... + 180167.

It is an arithmetic number, because the mean of its divisors is an integer number (540486).

2^2161938 is an apocalyptic number.

2161938 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2161938 is a wasteful number, since it uses less digits than its factorization.

2161938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360328.

The product of its digits is 2592, while the sum is 30.

The square root of 2161938 is about 1470.3530188360. The cubic root of 2161938 is about 129.3047299790.

The spelling of 2161938 in words is "two million, one hundred sixty-one thousand, nine hundred thirty-eight".