240520305 has 16 divisors (see below), whose sum is σ = 389471040. Its totient is φ = 126731328.

The previous prime is 240520261. The next prime is 240520321. The reversal of 240520305 is 503025042.

It is not a de Polignac number, because 240520305 - 2¹⁶ = 240454769 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95350 + ... + 97839.

It is an arithmetic number, because the mean of its divisors is an integer number (24341940).

Almost surely, 2^240520305 is an apocalyptic number.

It is an amenable number.

240520305 is a deficient number, since it is larger than the sum of its proper divisors (148950735).

240520305 is a wasteful number, since it uses less digits than its factorization.

240520305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193280.

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 240520305 is about 15508.7170649284. The cubic root of 240520305 is about 621.8952627759.

Adding to 240520305 its reverse (503025042), we get a palindrome (743545347).

The spelling of 240520305 in words is "two hundred forty million, five hundred twenty thousand, three hundred five".