3201856540 has 24 divisors (see below), whose sum is σ = 6880270320. Its totient is φ = 1250957568.

The previous prime is 3201856499. The next prime is 3201856561. The reversal of 3201856540 is 456581023.

It is a junction number, because it is equal to n+sod(n) for n = 3201856496 and 3201856505.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1860685 + ... + 1862404.

It is an arithmetic number, because the mean of its divisors is an integer number (286677930).

Almost surely, 2^3201856540 is an apocalyptic number.

It is an amenable number.

3201856540 is an abundant number, since it is smaller than the sum of its proper divisors (3678413780).

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

3201856540 is a wasteful number, since it uses less digits than its factorization.

3201856540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3723141 (or 3723139 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 3201856540 is about 56584.9497658167. The cubic root of 3201856540 is about 1473.8975256881.

The spelling of 3201856540 in words is "three billion, two hundred one million, eight hundred fifty-six thousand, five hundred forty".