240749540 has 48 divisors (see below), whose sum is σ = 520055424. Its totient is φ = 93561600.

The previous prime is 240749521. The next prime is 240749549. The reversal of 240749540 is 45947042.

It is a self number, because there is not a number n which added to its sum of digits gives 240749540.

It is not an unprimeable number, because it can be changed into a prime (240749549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 270977 + ... + 271863.

It is an arithmetic number, because the mean of its divisors is an integer number (10834488).

Almost surely, 2^240749540 is an apocalyptic number.

240749540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 240749540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260027712).

240749540 is an abundant number, since it is smaller than the sum of its proper divisors (279305884).

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

240749540 is a wasteful number, since it uses less digits than its factorization.

240749540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1268 (or 1266 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 240749540 is about 15516.1058258830. The cubic root of 240749540 is about 622.0927719413.

The spelling of 240749540 in words is "two hundred forty million, seven hundred forty-nine thousand, five hundred forty".