243455964 has 12 divisors (see below), whose sum is σ = 568063944. Its totient is φ = 81151984.

The previous prime is 243455939. The next prime is 243455983. The reversal of 243455964 is 469554342.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10143987 + ... + 10144010.

It is an arithmetic number, because the mean of its divisors is an integer number (47338662).

Almost surely, 2^243455964 is an apocalyptic number.

It is an amenable number.

243455964 is an abundant number, since it is smaller than the sum of its proper divisors (324607980).

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

243455964 is a wasteful number, since it uses less digits than its factorization.

243455964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20288004 (or 20288002 counting only the distinct ones).

The product of its digits is 518400, while the sum is 42.

The square root of 243455964 is about 15603.0754660740. The cubic root of 243455964 is about 624.4152089484.

The spelling of 243455964 in words is "two hundred forty-three million, four hundred fifty-five thousand, nine hundred sixty-four".