243257088 has 72 divisors (see below), whose sum is σ = 649893888. Its totient is φ = 80776192.

The previous prime is 243257087. The next prime is 243257107. The reversal of 243257088 is 880752342.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243257083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 293731 + ... + 294557.

It is an arithmetic number, because the mean of its divisors is an integer number (9026304).

Almost surely, 2^243257088 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 243257088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (324946944).

243257088 is an abundant number, since it is smaller than the sum of its proper divisors (406636800).

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

243257088 is an equidigital number, since it uses as much as digits as its factorization.

243257088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229 (or 1215 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 39.

The square root of 243257088 is about 15596.7011896747. The cubic root of 243257088 is about 624.2451370849.

It can be divided in two parts, 24325 and 7088, that added together give a palindrome (31413).

The spelling of 243257088 in words is "two hundred forty-three million, two hundred fifty-seven thousand, eighty-eight".