3965389650 has 144 divisors (see below), whose sum is σ = 10835386848. Its totient is φ = 1039584000.

The previous prime is 3965389643. The next prime is 3965389651. The reversal of 3965389650 is 569835693.

3965389650 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 a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3965389651) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 8075905 + ... + 8076395.

It is an arithmetic number, because the mean of its divisors is an integer number (75245742).

Almost surely, 2^3965389650 is an apocalyptic number.

3965389650 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 3965389650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5417693424).

3965389650 is an abundant number, since it is smaller than the sum of its proper divisors (6869997198).

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

3965389650 is a wasteful number, since it uses less digits than its factorization.

3965389650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777 (or 769 counting only the distinct ones).

The product of its (nonzero) digits is 5248800, while the sum is 54.

The square root of 3965389650 is about 62971.3399095176. The cubic root of 3965389650 is about 1582.8094076922.

The spelling of 3965389650 in words is "three billion, nine hundred sixty-five million, three hundred eighty-nine thousand, six hundred fifty".