3916405 has 8 divisors (see below), whose sum is σ = 4713912. Its totient is φ = 3123648.

The previous prime is 3916403. The next prime is 3916411. The reversal of 3916405 is 5046193.

It can be written as a sum of positive squares in 4 ways, for example, as 253009 + 3663396 = 503^2 + 1914^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 3916405 - 2¹ = 3916403 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3916403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 999 + ... + 2971.

It is an arithmetic number, because the mean of its divisors is an integer number (589239).

Almost surely, 2^3916405 is an apocalyptic number.

It is an amenable number.

3916405 is a deficient number, since it is larger than the sum of its proper divisors (797507).

3916405 is a wasteful number, since it uses less digits than its factorization.

3916405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2375.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 3916405 is about 1978.9909044763. The cubic root of 3916405 is about 157.6264877920.

The spelling of 3916405 in words is "three million, nine hundred sixteen thousand, four hundred five".