243475638 has 32 divisors (see below), whose sum is σ = 557798400. Its totient is φ = 69404160.

The previous prime is 243475627. The next prime is 243475657. The reversal of 243475638 is 836574342.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 243475638.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 12403 + ... + 25313.

It is an arithmetic number, because the mean of its divisors is an integer number (17431200).

Almost surely, 2^243475638 is an apocalyptic number.

243475638 is an abundant number, since it is smaller than the sum of its proper divisors (314322762).

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

243475638 is a wasteful number, since it uses less digits than its factorization.

243475638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13372.

The product of its digits is 483840, while the sum is 42.

The square root of 243475638 is about 15603.7059059699. The cubic root of 243475638 is about 624.4320284363.

The spelling of 243475638 in words is "two hundred forty-three million, four hundred seventy-five thousand, six hundred thirty-eight".