3855436686 has 48 divisors (see below), whose sum is σ = 8775280800. Its totient is φ = 1221000000.

The previous prime is 3855436679. The next prime is 3855436693. The reversal of 3855436686 is 6866345583.

It is a happy number.

3855436686 is a `hidden beast` number, since 3 + 8 + 554 + 3 + 6 + 6 + 86 = 666.

It is an interprime number because it is at equal distance from previous prime (3855436679) and next prime (3855436693).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30436 + ... + 92936.

It is an arithmetic number, because the mean of its divisors is an integer number (182818350).

Almost surely, 2^3855436686 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3855436686, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4387640400).

3855436686 is an abundant number, since it is smaller than the sum of its proper divisors (4919844114).

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

3855436686 is a wasteful number, since it uses less digits than its factorization.

3855436686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62681 (or 62678 counting only the distinct ones).

The product of its digits is 12441600, while the sum is 54.

The square root of 3855436686 is about 62092.1628387996. The cubic root of 3855436686 is about 1568.0426045167.

The spelling of 3855436686 in words is "three billion, eight hundred fifty-five million, four hundred thirty-six thousand, six hundred eighty-six".