240540505 has 8 divisors (see below), whose sum is σ = 288851400. Its totient is φ = 192297216.

The previous prime is 240540491. The next prime is 240540539. The reversal of 240540505 is 505045042.

It can be written as a sum of positive squares in 4 ways, for example, as 40487769 + 200052736 = 6363^2 + 14144^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 240540505 - 2⁹ = 240539993 is a prime.

It is a super-3 number, since 3×240540505³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 240540505.

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, 8710 + ... + 23599.

It is an arithmetic number, because the mean of its divisors is an integer number (36106425).

Almost surely, 2^240540505 is an apocalyptic number.

It is an amenable number.

240540505 is a deficient number, since it is larger than the sum of its proper divisors (48310895).

240540505 is a wasteful number, since it uses less digits than its factorization.

240540505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33803.

The product of its (nonzero) digits is 4000, while the sum is 25.

The square root of 240540505 is about 15509.3682979030. The cubic root of 240540505 is about 621.9126721621.

Adding to 240540505 its reverse (505045042), we get a palindrome (745585547).

The spelling of 240540505 in words is "two hundred forty million, five hundred forty thousand, five hundred five".