3851321136 has 80 divisors (see below), whose sum is σ = 10723834464. Its totient is φ = 1183997952.

The previous prime is 3851321093. The next prime is 3851321137. The reversal of 3851321136 is 6311231583.

It is a junction number, because it is equal to n+sod(n) for n = 3851321097 and 3851321106.

It is not an unprimeable number, because it can be changed into a prime (3851321137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1057110 + ... + 1060746.

Almost surely, 2^3851321136 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 3851321136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5361917232).

3851321136 is an abundant number, since it is smaller than the sum of its proper divisors (6872513328).

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

3851321136 is a wasteful number, since it uses less digits than its factorization.

3851321136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5358 (or 5352 counting only the distinct ones).

The product of its digits is 12960, while the sum is 33.

The square root of 3851321136 is about 62059.0133340839. The cubic root of 3851321136 is about 1567.4844614858.

The spelling of 3851321136 in words is "three billion, eight hundred fifty-one million, three hundred twenty-one thousand, one hundred thirty-six".