4391020 has 24 divisors (see below), whose sum is σ = 9269568. Its totient is φ = 1747200.

The previous prime is 4391017. The next prime is 4391027. The reversal of 4391020 is 201934.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (4391027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4365 + ... + 5275.

It is an arithmetic number, because the mean of its divisors is an integer number (386232).

Almost surely, 2^4391020 is an apocalyptic number.

It is an amenable number.

4391020 is an abundant number, since it is smaller than the sum of its proper divisors (4878548).

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

4391020 is a wasteful number, since it uses less digits than its factorization.

4391020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1161 (or 1159 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 4391020 is about 2095.4760795581. The cubic root of 4391020 is about 163.7527008470.

Adding to 4391020 its reverse (201934), we get a palindrome (4592954).

The spelling of 4391020 in words is "four million, three hundred ninety-one thousand, twenty".