243674240 has 128 divisors (see below), whose sum is σ = 635256000. Its totient is φ = 89026560.

The previous prime is 243674239. The next prime is 243674251. The reversal of 243674240 is 42476342.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 243674197 and 243674206.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 352295 + ... + 352985.

Almost surely, 2^243674240 is an apocalyptic number.

243674240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243674240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (317628000).

243674240 is an abundant number, since it is smaller than the sum of its proper divisors (391581760).

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

243674240 is a wasteful number, since it uses less digits than its factorization.

243674240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758 (or 746 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 32.

The square root of 243674240 is about 15610.0685456535. The cubic root of 243674240 is about 624.6017644407.

The spelling of 243674240 in words is "two hundred forty-three million, six hundred seventy-four thousand, two hundred forty".