4016391 has 16 divisors (see below), whose sum is σ = 5821440. Its totient is φ = 2453760.

The previous prime is 4016381. The next prime is 4016407. The reversal of 4016391 is 1936104.

4016391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 4016391 - 2¹⁰ = 4015367 is a prime.

It is a super-2 number, since 2×4016391² = 32262793329762, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4016321) 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, 631 + ... + 2903.

It is an arithmetic number, because the mean of its divisors is an integer number (363840).

Almost surely, 2^4016391 is an apocalyptic number.

4016391 is the 1268-th centered pentagonal number.

4016391 is a deficient number, since it is larger than the sum of its proper divisors (1805049).

4016391 is a wasteful number, since it uses less digits than its factorization.

4016391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2326.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 4016391 is about 2004.0935606902. The cubic root of 4016391 is about 158.9566354587.

The spelling of 4016391 in words is "four million, sixteen thousand, three hundred ninety-one".