3861659328 has 112 divisors (see below), whose sum is σ = 10489118976. Its totient is φ = 1253432320.

The previous prime is 3861659309. The next prime is 3861659393. The reversal of 3861659328 is 8239561683.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1129750 + ... + 1133162.

It is an arithmetic number, because the mean of its divisors is an integer number (93652848).

Almost surely, 2^3861659328 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 3861659328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5244559488).

3861659328 is an abundant number, since it is smaller than the sum of its proper divisors (6627459648).

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

3861659328 is a wasteful number, since it uses less digits than its factorization.

3861659328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3582 (or 3572 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 51.

The square root of 3861659328 is about 62142.2507477803. The cubic root of 3861659328 is about 1568.8857535405.

The spelling of 3861659328 in words is "three billion, eight hundred sixty-one million, six hundred fifty-nine thousand, three hundred twenty-eight".