243693696 has 128 divisors (see below), whose sum is σ = 689356800. Its totient is φ = 76059648.

The previous prime is 243693689. The next prime is 243693701. The reversal of 243693696 is 696396342.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 926461 + ... + 926723.

It is an arithmetic number, because the mean of its divisors is an integer number (5385600).

Almost surely, 2^243693696 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 243693696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (344678400).

243693696 is an abundant number, since it is smaller than the sum of its proper divisors (445663104).

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

243693696 is a wasteful number, since it uses less digits than its factorization.

243693696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426 (or 414 counting only the distinct ones).

The product of its digits is 1259712, while the sum is 48.

The square root of 243693696 is about 15610.6917207406. The cubic root of 243693696 is about 624.6183876293.

The spelling of 243693696 in words is "two hundred forty-three million, six hundred ninety-three thousand, six hundred ninety-six".