3855911040 has 160 divisors (see below), whose sum is σ = 13770339660. Its totient is φ = 1028229120.

The previous prime is 3855911029. The next prime is 3855911057. The reversal of 3855911040 is 401195583.

It can be written as a sum of positive squares in 2 ways, for example, as 3825175104 + 30735936 = 61848^2 + 5544^2 .

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 3855910986 and 3855911004.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 14650 + ... + 89030.

Almost surely, 2^3855911040 is an apocalyptic number.

3855911040 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 3855911040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6885169830).

3855911040 is an abundant number, since it is smaller than the sum of its proper divisors (9914428620).

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

3855911040 is an equidigital number, since it uses as much as digits as its factorization.

3855911040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74412 (or 74391 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 3855911040 is about 62095.9824787401. The cubic root of 3855911040 is about 1568.1069099672.

The spelling of 3855911040 in words is "three billion, eight hundred fifty-five million, nine hundred eleven thousand, forty".