240534640 has 40 divisors (see below), whose sum is σ = 560499840. Its totient is φ = 95997696.

The previous prime is 240534607. The next prime is 240534641. The reversal of 240534640 is 46435042.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 240534599 and 240534608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240534641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35182 + ... + 41458.

It is an arithmetic number, because the mean of its divisors is an integer number (14012496).

Almost surely, 2^240534640 is an apocalyptic number.

240534640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

240534640 is an abundant number, since it is smaller than the sum of its proper divisors (319965200).

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

240534640 is a wasteful number, since it uses less digits than its factorization.

240534640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6769 (or 6763 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 240534640 is about 15509.1792174828. The cubic root of 240534640 is about 621.9076175075.

Adding to 240534640 its reverse (46435042), we get a palindrome (286969682).

The spelling of 240534640 in words is "two hundred forty million, five hundred thirty-four thousand, six hundred forty".