243476890 has 16 divisors (see below), whose sum is σ = 464038632. Its totient is φ = 91661824.

The previous prime is 243476881. The next prime is 243476899. The reversal of 243476890 is 98674342.

It is an interprime number because it is at equal distance from previous prime (243476881) and next prime (243476899).

It can be written as a sum of positive squares in 4 ways, for example, as 243141649 + 335241 = 15593^2 + 579^2 .

It is not an unprimeable number, because it can be changed into a prime (243476899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 715939 + ... + 716278.

Almost surely, 2^243476890 is an apocalyptic number.

243476890 is a deficient number, since it is larger than the sum of its proper divisors (220561742).

243476890 is a wasteful number, since it uses less digits than its factorization.

243476890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1432241.

The product of its (nonzero) digits is 290304, while the sum is 43.

The square root of 243476890 is about 15603.7460245929. The cubic root of 243476890 is about 624.4330987522.

The spelling of 243476890 in words is "two hundred forty-three million, four hundred seventy-six thousand, eight hundred ninety".