240809305 has 8 divisors (see below), whose sum is σ = 315241344. Its totient is φ = 175134000.

The previous prime is 240809297. The next prime is 240809321. The reversal of 240809305 is 503908042.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 240809305 - 2³ = 240809297 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2189121 + ... + 2189230.

It is an arithmetic number, because the mean of its divisors is an integer number (39405168).

Almost surely, 2^240809305 is an apocalyptic number.

It is an amenable number.

240809305 is a deficient number, since it is larger than the sum of its proper divisors (74432039).

240809305 is a wasteful number, since it uses less digits than its factorization.

240809305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4378367.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 240809305 is about 15518.0316084225. The cubic root of 240809305 is about 622.1442449346.

The spelling of 240809305 in words is "two hundred forty million, eight hundred nine thousand, three hundred five".