243880619520 has 480 divisors, whose sum is σ = 833948945280. Its totient is φ = 60630958080.

The previous prime is 243880619491. The next prime is 243880619533. The reversal of 243880619520 is 25916088342.

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 243880619520.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1155832215 + ... + 1155832425.

It is an arithmetic number, because the mean of its divisors is an integer number (1737393636).

Almost surely, 2^243880619520 is an apocalyptic number.

243880619520 is a gapful number since it is divisible by the number (20) 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 243880619520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (416974472640).

243880619520 is an abundant number, since it is smaller than the sum of its proper divisors (590068325760).

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

243880619520 is an equidigital number, since it uses as much as digits as its factorization.

243880619520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434 (or 329 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 48.

The spelling of 243880619520 in words is "two hundred forty-three billion, eight hundred eighty million, six hundred nineteen thousand, five hundred twenty".