240539247 has 16 divisors (see below), whose sum is σ = 383766880. Its totient is φ = 148023936.

The previous prime is 240539219. The next prime is 240539353. The reversal of 240539247 is 742935042.

240539247 is a `hidden beast` number, since 2 + 405 + 3 + 9 + 247 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-240539247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240539207) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 342298 + ... + 342999.

It is an arithmetic number, because the mean of its divisors is an integer number (23985430).

Almost surely, 2^240539247 is an apocalyptic number.

240539247 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

240539247 is a deficient number, since it is larger than the sum of its proper divisors (143227633).

240539247 is a wasteful number, since it uses less digits than its factorization.

240539247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685319 (or 685313 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 240539247 is about 15509.3277417172. The cubic root of 240539247 is about 621.9115879822.

Subtracting from 240539247 its sum of digits (36), we obtain a triangular number (240539211 = T₂₁₉₃₃).

The spelling of 240539247 in words is "two hundred forty million, five hundred thirty-nine thousand, two hundred forty-seven".