243360640 has 32 divisors (see below), whose sum is σ = 581785560. Its totient is φ = 97344000.

The previous prime is 243360629. The next prime is 243360653. The reversal of 243360640 is 46063342.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×243360640² = 118448802202419200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243360599 and 243360608.

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, 189486 + ... + 190765.

Almost surely, 2^243360640 is an apocalyptic number.

243360640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243360640 is an abundant number, since it is smaller than the sum of its proper divisors (338424920).

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

243360640 is an equidigital number, since it uses as much as digits as its factorization.

243360640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380270 (or 380258 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 28.

The square root of 243360640 is about 15600.0205128070. The cubic root of 243360640 is about 624.3337027291. Note that the first 3 decimals are identical.

It can be divided in two parts, 243360 and 640, that multiplied together give a square (155750400 = 12480²).

The spelling of 243360640 in words is "two hundred forty-three million, three hundred sixty thousand, six hundred forty".