243478260 has 36 divisors (see below), whose sum is σ = 738551268. Its totient is φ = 64927488.

The previous prime is 243478231. The next prime is 243478271. The reversal of 243478260 is 62874342.

It can be written as a sum of positive squares in 2 ways, for example, as 126967824 + 116510436 = 11268^2 + 10794^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 676149 + ... + 676508.

It is an arithmetic number, because the mean of its divisors is an integer number (20515313).

Almost surely, 2^243478260 is an apocalyptic number.

243478260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243478260 is an abundant number, since it is smaller than the sum of its proper divisors (495073008).

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

243478260 is a wasteful number, since it uses less digits than its factorization.

243478260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1352672 (or 1352667 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The square root of 243478260 is about 15603.7899242460. The cubic root of 243478260 is about 624.4342699404.

The spelling of 243478260 in words is "two hundred forty-three million, four hundred seventy-eight thousand, two hundred sixty".