243943402 has 16 divisors (see below), whose sum is σ = 378461952. Its totient is φ = 117804960.

The previous prime is 243943379. The next prime is 243943409. The reversal of 243943402 is 204349342.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (243943409) 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, 30318 + ... + 37510.

It is an arithmetic number, because the mean of its divisors is an integer number (23653872).

Almost surely, 2^243943402 is an apocalyptic number.

243943402 is a deficient number, since it is larger than the sum of its proper divisors (134518550).

243943402 is a wasteful number, since it uses less digits than its factorization.

243943402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7773.

The product of its (nonzero) digits is 20736, while the sum is 31.

The square root of 243943402 is about 15618.6875889109. The cubic root of 243943402 is about 624.8316577015.

The spelling of 243943402 in words is "two hundred forty-three million, nine hundred forty-three thousand, four hundred two".