243490485780 has 576 divisors, whose sum is σ = 829699573248. Its totient is φ = 59779399680.

The previous prime is 243490485739. The next prime is 243490485781. The reversal of 243490485780 is 87584094342.

243490485780 is a `hidden beast` number, since 2 + 4 + 3 + 4 + 90 + 485 + 78 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243490485781) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 467351920 + ... + 467352440.

It is an arithmetic number, because the mean of its divisors is an integer number (1440450648).

Almost surely, 2^243490485780 is an apocalyptic number.

243490485780 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 243490485780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (414849786624).

243490485780 is an abundant number, since it is smaller than the sum of its proper divisors (586209087468).

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

243490485780 is a wasteful number, since it uses less digits than its factorization.

243490485780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718 (or 704 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 54.

The spelling of 243490485780 in words is "two hundred forty-three billion, four hundred ninety million, four hundred eighty-five thousand, seven hundred eighty".