243726464 has 64 divisors (see below), whose sum is σ = 505267200. Its totient is φ = 116981760.

The previous prime is 243726449. The next prime is 243726481. The reversal of 243726464 is 464627342.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 948224 + ... + 948480.

It is an arithmetic number, because the mean of its divisors is an integer number (7894800).

Almost surely, 2^243726464 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 243726464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (252633600).

243726464 is an abundant number, since it is smaller than the sum of its proper divisors (261540736).

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

243726464 is a wasteful number, since it uses less digits than its factorization.

243726464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541 (or 529 counting only the distinct ones).

The product of its digits is 193536, while the sum is 38.

The square root of 243726464 is about 15611.7412225543. The cubic root of 243726464 is about 624.6463825786.

The spelling of 243726464 in words is "two hundred forty-three million, seven hundred twenty-six thousand, four hundred sixty-four".