4340391 has 16 divisors (see below), whose sum is σ = 6371328. Its totient is φ = 2628120.

The previous prime is 4340381. The next prime is 4340407. The reversal of 4340391 is 1930434.

It is not a de Polignac number, because 4340391 - 2¹⁰ = 4339367 is a prime.

4340391 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4340351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3450 + ... + 4536.

It is an arithmetic number, because the mean of its divisors is an integer number (398208).

Almost surely, 2^4340391 is an apocalyptic number.

4340391 is a deficient number, since it is larger than the sum of its proper divisors (2030937).

4340391 is a wasteful number, since it uses less digits than its factorization.

4340391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1123 (or 1101 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 4340391 is about 2083.3605064895. The cubic root of 4340391 is about 163.1209034364.

The spelling of 4340391 in words is "four million, three hundred forty thousand, three hundred ninety-one".