243381456 has 80 divisors (see below), whose sum is σ = 722721600. Its totient is φ = 78325632.

The previous prime is 243381433. The next prime is 243381473. The reversal of 243381456 is 654183342.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 243381456.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2815 + ... + 22241.

It is an arithmetic number, because the mean of its divisors is an integer number (9034020).

Almost surely, 2^243381456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243381456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (361360800).

243381456 is an abundant number, since it is smaller than the sum of its proper divisors (479340144).

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

243381456 is a wasteful number, since it uses less digits than its factorization.

243381456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19473 (or 19461 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 243381456 is about 15600.6876771506. The cubic root of 243381456 is about 624.3515031423.

The spelling of 243381456 in words is "two hundred forty-three million, three hundred eighty-one thousand, four hundred fifty-six".