3440021 has 8 divisors (see below), whose sum is σ = 3757824. Its totient is φ = 3129840.

The previous prime is 3440011. The next prime is 3440029. The reversal of 3440021 is 1200443.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3440021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3439978 and 3440005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3440029) 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, 941 + ... + 2786.

It is an arithmetic number, because the mean of its divisors is an integer number (469728).

Almost surely, 2^3440021 is an apocalyptic number.

It is an amenable number.

3440021 is a deficient number, since it is larger than the sum of its proper divisors (317803).

3440021 is a wasteful number, since it uses less digits than its factorization.

3440021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3811.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 3440021 is about 1854.7293603111. The cubic root of 3440021 is about 150.9571534648.

Adding to 3440021 its reverse (1200443), we get a palindrome (4640464).

The spelling of 3440021 in words is "three million, four hundred forty thousand, twenty-one".