3940417 has 8 divisors (see below), whose sum is σ = 4313960. Its totient is φ = 3576960.

The previous prime is 3940411. The next prime is 3940427. The reversal of 3940417 is 7140493.

It can be written as a sum of positive squares in 4 ways, for example, as 269361 + 3671056 = 519^2 + 1916^2 .

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 3940417 - 2⁷ = 3940289 is a prime.

It is a super-2 number, since 2×3940417² = 31053772267778, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3940411) 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, 1692 + ... + 3277.

It is an arithmetic number, because the mean of its divisors is an integer number (539245).

Almost surely, 2^3940417 is an apocalyptic number.

It is an amenable number.

3940417 is a deficient number, since it is larger than the sum of its proper divisors (373543).

3940417 is a wasteful number, since it uses less digits than its factorization.

3940417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5043.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 3940417 is about 1985.0483621313. The cubic root of 3940417 is about 157.9479746461.

Subtracting from 3940417 its product of nonzero digits (3024), we obtain a palindrome (3937393).

The spelling of 3940417 in words is "three million, nine hundred forty thousand, four hundred seventeen".