240643356 has 12 divisors (see below), whose sum is σ = 561501192. Its totient is φ = 80214448.

The previous prime is 240643343. The next prime is 240643399. The reversal of 240643356 is 653346042.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10026795 + ... + 10026818.

It is an arithmetic number, because the mean of its divisors is an integer number (46791766).

Almost surely, 2^240643356 is an apocalyptic number.

It is an amenable number.

240643356 is an abundant number, since it is smaller than the sum of its proper divisors (320857836).

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

240643356 is a wasteful number, since it uses less digits than its factorization.

240643356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20053620 (or 20053618 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 33.

The square root of 240643356 is about 15512.6837136583. The cubic root of 240643356 is about 622.0012992670.

Adding to 240643356 its reverse (653346042), we get a palindrome (893989398).

The spelling of 240643356 in words is "two hundred forty million, six hundred forty-three thousand, three hundred fifty-six".