3895508820 has 144 divisors (see below), whose sum is σ = 13356221760. Its totient is φ = 843526656.

The previous prime is 3895508819. The next prime is 3895508833. The reversal of 3895508820 is 288055983.

3895508820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 3895508820.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20992 + ... + 90728.

It is an arithmetic number, because the mean of its divisors is an integer number (92751540).

Almost surely, 2^3895508820 is an apocalyptic number.

3895508820 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 3895508820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6678110880).

3895508820 is an abundant number, since it is smaller than the sum of its proper divisors (9460712940).

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

3895508820 is a wasteful number, since it uses less digits than its factorization.

3895508820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69782 (or 69773 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 48.

The square root of 3895508820 is about 62414.0114076959. The cubic root of 3895508820 is about 1573.4564631005.

The spelling of 3895508820 in words is "three billion, eight hundred ninety-five million, five hundred eight thousand, eight hundred twenty".