3840213421 has 12 divisors (see below), whose sum is σ = 4300710876. Its totient is φ = 3425227520.

The previous prime is 3840213407. The next prime is 3840213431. The reversal of 3840213421 is 1243120483.

It can be written as a sum of positive squares in 2 ways, for example, as 2643399396 + 1196814025 = 51414^2 + 34595^2 .

It is not a de Polignac number, because 3840213421 - 2⁵ = 3840213389 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3840213421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3840213401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 292996 + ... + 305821.

It is an arithmetic number, because the mean of its divisors is an integer number (358392573).

Almost surely, 2^3840213421 is an apocalyptic number.

It is an amenable number.

3840213421 is a deficient number, since it is larger than the sum of its proper divisors (460497455).

3840213421 is a wasteful number, since it uses less digits than its factorization.

3840213421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598892 (or 598881 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 3840213421 is about 61969.4555486814. The cubic root of 3840213421 is about 1565.9760668665.

The spelling of 3840213421 in words is "three billion, eight hundred forty million, two hundred thirteen thousand, four hundred twenty-one".