243329620 has 12 divisors (see below), whose sum is σ = 510992244. Its totient is φ = 97331840.

The previous prime is 243329617. The next prime is 243329657. The reversal of 243329620 is 26923342.

It can be written as a sum of positive squares in 2 ways, for example, as 133541136 + 109788484 = 11556^2 + 10478^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6083221 + ... + 6083260.

It is an arithmetic number, because the mean of its divisors is an integer number (42582687).

Almost surely, 2^243329620 is an apocalyptic number.

243329620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243329620 is an abundant number, since it is smaller than the sum of its proper divisors (267662624).

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

243329620 is a wasteful number, since it uses less digits than its factorization.

243329620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12166490 (or 12166488 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 243329620 is about 15599.0262516607. The cubic root of 243329620 is about 624.3071746727.

The spelling of 243329620 in words is "two hundred forty-three million, three hundred twenty-nine thousand, six hundred twenty".