3861421650 has 144 divisors (see below), whose sum is σ = 11033856288. Its totient is φ = 964800000.

The previous prime is 3861421643. The next prime is 3861421673. The reversal of 3861421650 is 561241683.

It is a happy number.

3861421650 is a `hidden beast` number, since 38 + 614 + 2 + 1 + 6 + 5 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1919145 + ... + 1921155.

It is an arithmetic number, because the mean of its divisors is an integer number (76624002).

Almost surely, 2^3861421650 is an apocalyptic number.

3861421650 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3861421650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5516928144).

3861421650 is an abundant number, since it is smaller than the sum of its proper divisors (7172434638).

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

3861421650 is a wasteful number, since it uses less digits than its factorization.

3861421650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2297 (or 2289 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 3861421650 is about 62140.3383479685. The cubic root of 3861421650 is about 1568.8535655398.

The spelling of 3861421650 in words is "three billion, eight hundred sixty-one million, four hundred twenty-one thousand, six hundred fifty".