3853021440 has 144 divisors (see below), whose sum is σ = 13029666048. Its totient is φ = 967016448.

The previous prime is 3853021411. The next prime is 3853021441. The reversal of 3853021440 is 441203583.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 3853021398 and 3853021407.

It is not an unprimeable number, because it can be changed into a prime (3853021441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35769 + ... + 94791.

It is an arithmetic number, because the mean of its divisors is an integer number (90483792).

Almost surely, 2^3853021440 is an apocalyptic number.

3853021440 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 3853021440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6514833024).

3853021440 is an abundant number, since it is smaller than the sum of its proper divisors (9176644608).

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

3853021440 is a wasteful number, since it uses less digits than its factorization.

3853021440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59064 (or 59050 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 3853021440 is about 62072.7109122842. The cubic root of 3853021440 is about 1567.7151016467.

The spelling of 3853021440 in words is "three billion, eight hundred fifty-three million, twenty-one thousand, four hundred forty".