243290392 has 32 divisors (see below), whose sum is σ = 479949120. Its totient is φ = 115464960.

The previous prime is 243290381. The next prime is 243290401. The reversal of 243290392 is 293092342.

It is a happy number.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2113 + ... + 22159.

It is an arithmetic number, because the mean of its divisors is an integer number (14998410).

Almost surely, 2^243290392 is an apocalyptic number.

It is an amenable number.

243290392 is a deficient number, since it is larger than the sum of its proper divisors (236658728).

243290392 is a wasteful number, since it uses less digits than its factorization.

243290392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20131 (or 20127 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 243290392 is about 15597.7688148017. The cubic root of 243290392 is about 624.2736239716.

The spelling of 243290392 in words is "two hundred forty-three million, two hundred ninety thousand, three hundred ninety-two".