243976866400 has 36 divisors (see below), whose sum is σ = 595608527052. Its totient is φ = 97590746240.

The previous prime is 243976866377. The next prime is 243976866457. The reversal of 243976866400 is 4668679342.

It is a super-2 number, since 2×243976866400² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 152484742 + ... + 152486341.

It is an arithmetic number, because the mean of its divisors is an integer number (16544681307).

Almost surely, 2^243976866400 is an apocalyptic number.

243976866400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243976866400 is an abundant number, since it is smaller than the sum of its proper divisors (351631660652).

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

243976866400 is a wasteful number, since it uses less digits than its factorization.

243976866400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304971103 (or 304971090 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 55.

The spelling of 243976866400 in words is "two hundred forty-three billion, nine hundred seventy-six million, eight hundred sixty-six thousand, four hundred".