3621864438 has 12 divisors (see below), whose sum is σ = 7847372988. Its totient is φ = 1207288140.

The previous prime is 3621864397. The next prime is 3621864469. The reversal of 3621864438 is 8344681263.

3621864438 is a `hidden beast` number, since 36 + 2 + 186 + 4 + 438 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 3621864393 and 3621864402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 100607328 + ... + 100607363.

It is an arithmetic number, because the mean of its divisors is an integer number (653947749).

Almost surely, 2^3621864438 is an apocalyptic number.

3621864438 is an abundant number, since it is smaller than the sum of its proper divisors (4225508550).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3621864438 is a wasteful number, since it uses less digits than its factorization.

3621864438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201214699 (or 201214696 counting only the distinct ones).

The product of its digits is 663552, while the sum is 45.

The square root of 3621864438 is about 60181.9278355222. The cubic root of 3621864438 is about 1535.7153682998.

The spelling of 3621864438 in words is "three billion, six hundred twenty-one million, eight hundred sixty-four thousand, four hundred thirty-eight".