3851539380 has 144 divisors (see below), whose sum is σ = 13321932624. Its totient is φ = 892293120.

The previous prime is 3851539379. The next prime is 3851539399. The reversal of 3851539380 is 839351583.

3851539380 is a `hidden beast` number, since 3 + 85 + 1 + 539 + 38 + 0 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 221235876 + 3630303504 = 14874^2 + 60252^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

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 47 ways as a sum of consecutive naturals, for example, 8631 + ... + 88190.

It is an arithmetic number, because the mean of its divisors is an integer number (92513421).

Almost surely, 2^3851539380 is an apocalyptic number.

3851539380 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3851539380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6660966312).

3851539380 is an abundant number, since it is smaller than the sum of its proper divisors (9470393244).

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

3851539380 is a wasteful number, since it uses less digits than its factorization.

3851539380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96866 (or 96861 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The square root of 3851539380 is about 62060.7716677774. The cubic root of 3851539380 is about 1567.5140693013.

The spelling of 3851539380 in words is "three billion, eight hundred fifty-one million, five hundred thirty-nine thousand, three hundred eighty".