3861948809 has 8 divisors (see below), whose sum is σ = 4010746080. Its totient is φ = 3715832736.

The previous prime is 3861948751. The next prime is 3861948829. The reversal of 3861948809 is 9088491683.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3861948809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3861948829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 667364 + ... + 673125.

It is an arithmetic number, because the mean of its divisors is an integer number (501343260).

Almost surely, 2^3861948809 is an apocalyptic number.

It is an amenable number.

3861948809 is a deficient number, since it is larger than the sum of its proper divisors (148797271).

3861948809 is a wasteful number, since it uses less digits than its factorization.

3861948809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340599.

The product of its (nonzero) digits is 2985984, while the sum is 56.

The square root of 3861948809 is about 62144.5798843310. The cubic root of 3861948809 is about 1568.9249552782.

The spelling of 3861948809 in words is "three billion, eight hundred sixty-one million, nine hundred forty-eight thousand, eight hundred nine".