3621438843 has 16 divisors (see below), whose sum is σ = 5268765312. Its totient is φ = 2194304000.

The previous prime is 3621438841. The next prime is 3621438859. The reversal of 3621438843 is 3488341263.

It is a cyclic number.

It is not a de Polignac number, because 3621438843 - 2¹ = 3621438841 is a prime.

It is a super-2 number, since 2×3621438843² = 26229638587178357298, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 3621438795 and 3621438804.

It is not an unprimeable number, because it can be changed into a prime (3621438841) 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, 172603 + ... + 192443.

It is an arithmetic number, because the mean of its divisors is an integer number (329297832).

Almost surely, 2^3621438843 is an apocalyptic number.

3621438843 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

3621438843 is a deficient number, since it is larger than the sum of its proper divisors (1647326469).

3621438843 is a wasteful number, since it uses less digits than its factorization.

3621438843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25386.

The product of its digits is 331776, while the sum is 42.

The square root of 3621438843 is about 60178.3918279643. The cubic root of 3621438843 is about 1535.6552134270.

It can be divided in two parts, 36214 and 38843, that added together give a palindrome (75057).

The spelling of 3621438843 in words is "three billion, six hundred twenty-one million, four hundred thirty-eight thousand, eight hundred forty-three".