4418478720 has 192 divisors, whose sum is σ = 15823211040. Its totient is φ = 1178219520.

The previous prime is 4418478707. The next prime is 4418478731. The reversal of 4418478720 is 278748144.

It is a tau number, because it is divible by the number of its divisors (192).

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

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, 141315 + ... + 169725.

Almost surely, 2^4418478720 is an apocalyptic number.

4418478720 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 4418478720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7911605520).

4418478720 is an abundant number, since it is smaller than the sum of its proper divisors (11404732320).

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

4418478720 is an equidigital number, since it uses as much as digits as its factorization.

4418478720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28445 (or 28421 counting only the distinct ones).

The product of its (nonzero) digits is 401408, while the sum is 45.

The square root of 4418478720 is about 66471.6384633326. The cubic root of 4418478720 is about 1640.9332780374.

The spelling of 4418478720 in words is "four billion, four hundred eighteen million, four hundred seventy-eight thousand, seven hundred twenty".