3403406821 has 8 divisors (see below), whose sum is σ = 3447578880. Its totient is φ = 3359262192.

The previous prime is 3403406813. The next prime is 3403406857. The reversal of 3403406821 is 1286043043.

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 3403406821 - 2³ = 3403406813 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 (3403406801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 388536 + ... + 397198.

It is an arithmetic number, because the mean of its divisors is an integer number (430947360).

Almost surely, 2^3403406821 is an apocalyptic number.

It is an amenable number.

3403406821 is a deficient number, since it is larger than the sum of its proper divisors (44172059).

3403406821 is an equidigital number, since it uses as much as digits as its factorization.

3403406821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13715.

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 3403406821 is about 58338.7248832197. The cubic root of 3403406821 is about 1504.1966656410.

Adding to 3403406821 its reverse (1286043043), we get a palindrome (4689449864).

The spelling of 3403406821 in words is "three billion, four hundred three million, four hundred six thousand, eight hundred twenty-one".