243128032308 has 144 divisors (see below), whose sum is σ = 727069150080. Its totient is φ = 67025532672.

The previous prime is 243128032289. The next prime is 243128032333. The reversal of 243128032308 is 803230821342.

243128032308 is a `hidden beast` number, since 2 + 4 + 312 + 8 + 0 + 32 + 308 = 666.

It is a super-2 number, since 2×243128032308² (a number of 24 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11953035 + ... + 11973357.

It is an arithmetic number, because the mean of its divisors is an integer number (5049091320).

Almost surely, 2^243128032308 is an apocalyptic number.

243128032308 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243128032308, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (363534575040).

243128032308 is an abundant number, since it is smaller than the sum of its proper divisors (483941117772).

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

243128032308 is a wasteful number, since it uses less digits than its factorization.

243128032308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22006 (or 22001 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The spelling of 243128032308 in words is "two hundred forty-three billion, one hundred twenty-eight million, thirty-two thousand, three hundred eight".