243866398 has 16 divisors (see below), whose sum is σ = 382924800. Its totient is φ = 116335800.

The previous prime is 243866393. The next prime is 243866417. The reversal of 243866398 is 893668342.

It is a happy number.

243866398 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243866393) 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, 23298 + ... + 32101.

It is an arithmetic number, because the mean of its divisors is an integer number (23932800).

Almost surely, 2^243866398 is an apocalyptic number.

243866398 is a deficient number, since it is larger than the sum of its proper divisors (139058402).

243866398 is a wasteful number, since it uses less digits than its factorization.

243866398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55503.

The product of its digits is 1492992, while the sum is 49.

The square root of 243866398 is about 15616.2222704468. Note that the first 4 decimals coincide. The cubic root of 243866398 is about 624.7659052904.

The spelling of 243866398 in words is "two hundred forty-three million, eight hundred sixty-six thousand, three hundred ninety-eight".