3857684736 has 72 divisors (see below), whose sum is σ = 10278736384. Its totient is φ = 1284433920.

The previous prime is 3857684717. The next prime is 3857684737. The reversal of 3857684736 is 6374867583.

3857684736 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (3857684737) 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, 832506 + ... + 837126.

Almost surely, 2^3857684736 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3857684736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5139368192).

3857684736 is an abundant number, since it is smaller than the sum of its proper divisors (6421051648).

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

3857684736 is a wasteful number, since it uses less digits than its factorization.

3857684736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5727 (or 5713 counting only the distinct ones).

The product of its digits is 20321280, while the sum is 57.

The square root of 3857684736 is about 62110.2627268634. The cubic root of 3857684736 is about 1568.3473130406.

The spelling of 3857684736 in words is "three billion, eight hundred fifty-seven million, six hundred eighty-four thousand, seven hundred thirty-six".