243804862756 has 81 divisors (see below), whose sum is σ = 537630231411. Its totient is φ = 96414724224.

The previous prime is 243804862711. The next prime is 243804862787. The reversal of 243804862756 is 657268408342.

The square root of 243804862756 is 493766.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 18559702756 + 225245160000 = 136234^2 + 474600^2 .

It is a super-2 number, since 2×243804862756² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243804862697 and 243804862706.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 89864056 + ... + 89866768.

Almost surely, 2^243804862756 is an apocalyptic number.

243804862756 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

243804862756 is the 493766-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243804862756

243804862756 is an abundant number, since it is smaller than the sum of its proper divisors (293825368655).

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

243804862756 is an equidigital number, since it uses as much as digits as its factorization.

243804862756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5470 (or 2735 counting only the distinct ones).

The product of its (nonzero) digits is 15482880, while the sum is 55.

The spelling of 243804862756 in words is "two hundred forty-three billion, eight hundred four million, eight hundred sixty-two thousand, seven hundred fifty-six".