4018947840 has 504 divisors, whose sum is σ = 14879052720. Its totient is φ = 1039122432.

The previous prime is 4018947839. The next prime is 4018947841. The reversal of 4018947840 is 487498104.

It is an interprime number because it is at equal distance from previous prime (4018947839) and next prime (4018947841).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4018947841) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 55054044 + ... + 55054116.

It is an arithmetic number, because the mean of its divisors is an integer number (29521930).

Almost surely, 2^4018947840 is an apocalyptic number.

4018947840 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 4018947840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7439526360).

4018947840 is an abundant number, since it is smaller than the sum of its proper divisors (10860104880).

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

4018947840 is an frugal number, since it uses more digits than its factorization.

4018947840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The square root of 4018947840 is about 63395.1720559224. The cubic root of 4018947840 is about 1589.9035897399.

The spelling of 4018947840 in words is "four billion, eighteen million, nine hundred forty-seven thousand, eight hundred forty".