4018911840 has 144 divisors (see below), whose sum is σ = 14049243936. Its totient is φ = 1045555200.

The previous prime is 4018911833. The next prime is 4018912003. The reversal of 4018911840 is 481198104.

It is a tau number, because it is divible by the number of its divisors (144).

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 = 4018911795 and 4018911804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25005 + ... + 93075.

It is an arithmetic number, because the mean of its divisors is an integer number (97564194).

Almost surely, 2^4018911840 is an apocalyptic number.

4018911840 is a gapful number since it is divisible by the number (40) 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 4018911840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7024621968).

4018911840 is an abundant number, since it is smaller than the sum of its proper divisors (10030332096).

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

4018911840 is a wasteful number, since it uses less digits than its factorization.

4018911840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68133 (or 68122 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The square root of 4018911840 is about 63394.8881219929. Note that the first 3 decimals coincide. The cubic root of 4018911840 is about 1589.8988425023.

The spelling of 4018911840 in words is "four billion, eighteen million, nine hundred eleven thousand, eight hundred forty".