243998946 has 16 divisors (see below), whose sum is σ = 542220000. Its totient is φ = 81332964.

The previous prime is 243998933. The next prime is 243998947. The reversal of 243998946 is 649899342.

It is a super-2 number, since 2×243998946² = 119070971298221832, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 4518499 = 243998946 / (2 + 4 + 3 + 9 + 9 + 8 + 9 + 4 + 6).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 243998892 and 243998901.

It is not an unprimeable number, because it can be changed into a prime (243998947) 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, 2259196 + ... + 2259303.

It is an arithmetic number, because the mean of its divisors is an integer number (33888750).

Almost surely, 2^243998946 is an apocalyptic number.

243998946 is an abundant number, since it is smaller than the sum of its proper divisors (298221054).

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

243998946 is a wasteful number, since it uses less digits than its factorization.

243998946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4518510 (or 4518504 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 54.

The square root of 243998946 is about 15620.4656140590. The cubic root of 243998946 is about 624.8790771925.

The spelling of 243998946 in words is "two hundred forty-three million, nine hundred ninety-eight thousand, nine hundred forty-six".