4191940 has 12 divisors (see below), whose sum is σ = 8803116. Its totient is φ = 1676768.

The previous prime is 4191931. The next prime is 4191947. The reversal of 4191940 is 491914.

It can be written as a sum of positive squares in 2 ways, for example, as 2883204 + 1308736 = 1698^2 + 1144^2 .

It is a junction number, because it is equal to n+sod(n) for n = 4191899 and 4191908.

It is not an unprimeable number, because it can be changed into a prime (4191947) 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, 104779 + ... + 104818.

It is an arithmetic number, because the mean of its divisors is an integer number (733593).

Almost surely, 2^4191940 is an apocalyptic number.

It is an amenable number.

4191940 is an abundant number, since it is smaller than the sum of its proper divisors (4611176).

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

4191940 is a wasteful number, since it uses less digits than its factorization.

4191940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209606 (or 209604 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 4191940 is about 2047.4227702163. The cubic root of 4191940 is about 161.2395902981.

The spelling of 4191940 in words is "four million, one hundred ninety-one thousand, nine hundred forty".