243684608 has 18 divisors (see below), whose sum is σ = 486417834. Its totient is φ = 121842176.

The previous prime is 243684589. The next prime is 243684611. The reversal of 243684608 is 806486342.

It can be written as a sum of positive squares in only one way, i.e., 190219264 + 53465344 = 13792^2 + 7312^2 .

It is a super-2 number, since 2×243684608² = 118764376352227328, which contains 22 as substring.

It is a nialpdrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 475691 + ... + 476202.

It is an arithmetic number, because the mean of its divisors is an integer number (27023213).

Almost surely, 2^243684608 is an apocalyptic number.

It is an amenable number.

243684608 is a deficient number, since it is larger than the sum of its proper divisors (242733226).

243684608 is an frugal number, since it uses more digits than its factorization.

243684608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 951909 (or 951895 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 41.

The square root of 243684608 is about 15610.4006354738. The cubic root of 243684608 is about 624.6106229605.

The spelling of 243684608 in words is "two hundred forty-three million, six hundred eighty-four thousand, six hundred eight".