243653472 has 72 divisors (see below), whose sum is σ = 701306424. Its totient is φ = 80231424.

The previous prime is 243653471. The next prime is 243653489. The reversal of 243653472 is 274356342.

243653472 is a `hidden beast` number, since 24 + 36 + 534 + 72 = 666.

243653472 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (72).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243653471) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18808 + ... + 29000.

It is an arithmetic number, because the mean of its divisors is an integer number (9740367).

Almost surely, 2^243653472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243653472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (350653212).

243653472 is an abundant number, since it is smaller than the sum of its proper divisors (457652952).

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

243653472 is a wasteful number, since it uses less digits than its factorization.

243653472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10292 (or 10281 counting only the distinct ones).

The product of its digits is 120960, while the sum is 36.

The square root of 243653472 is about 15609.4033197941. The cubic root of 243653472 is about 624.5840193042.

The spelling of 243653472 in words is "two hundred forty-three million, six hundred fifty-three thousand, four hundred seventy-two".