243680398 has 64 divisors (see below), whose sum is σ = 425779200. Its totient is φ = 103783680.

The previous prime is 243680369. The next prime is 243680401. The reversal of 243680398 is 893086342.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2737938 + ... + 2738026.

It is an arithmetic number, because the mean of its divisors is an integer number (6652800).

Almost surely, 2^243680398 is an apocalyptic number.

243680398 is a deficient number, since it is larger than the sum of its proper divisors (182098802).

243680398 is a wasteful number, since it uses less digits than its factorization.

243680398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257.

The product of its (nonzero) digits is 248832, while the sum is 43.

The square root of 243680398 is about 15610.2657888967. The cubic root of 243680398 is about 624.6070259260.

The spelling of 243680398 in words is "two hundred forty-three million, six hundred eighty thousand, three hundred ninety-eight".