240531540 has 48 divisors (see below), whose sum is σ = 684539520. Its totient is φ = 63089280.

The previous prime is 240531527. The next prime is 240531671. The reversal of 240531540 is 45135042.

It is a self number, because there is not a number n which added to its sum of digits gives 240531540.

It is a congruent number.

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, 29200 + ... + 36519.

It is an arithmetic number, because the mean of its divisors is an integer number (14261240).

Almost surely, 2^240531540 is an apocalyptic number.

240531540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

240531540 is an abundant number, since it is smaller than the sum of its proper divisors (444007980).

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

240531540 is a wasteful number, since it uses less digits than its factorization.

240531540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65792 (or 65790 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 240531540 is about 15509.0792763465. The cubic root of 240531540 is about 621.9049457899.

Adding to 240531540 its reverse (45135042), we get a palindrome (285666582).

The spelling of 240531540 in words is "two hundred forty million, five hundred thirty-one thousand, five hundred forty".