3420904821 has 16 divisors (see below), whose sum is σ = 4590365760. Its totient is φ = 2266064640.

The previous prime is 3420904789. The next prime is 3420904829. The reversal of 3420904821 is 1284090243.

It is not a de Polignac number, because 3420904821 - 2⁵ = 3420904789 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3420904829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 354541 + ... + 364061.

It is an arithmetic number, because the mean of its divisors is an integer number (286897860).

Almost surely, 2^3420904821 is an apocalyptic number.

It is an amenable number.

3420904821 is a deficient number, since it is larger than the sum of its proper divisors (1169460939).

3420904821 is a wasteful number, since it uses less digits than its factorization.

3420904821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10276.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 3420904821 is about 58488.5016135650. The cubic root of 3420904821 is about 1506.7701119738.

The spelling of 3420904821 in words is "three billion, four hundred twenty million, nine hundred four thousand, eight hundred twenty-one".