240650640 has 120 divisors (see below), whose sum is σ = 855768888. Its totient is φ = 60395520.

The previous prime is 240650639. The next prime is 240650651. The reversal of 240650640 is 46056042.

It is a happy number.

240650640 is a `hidden beast` number, since 2 + 4 + 0 + 650 + 6 + 4 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 54819216 + 185831424 = 7404^2 + 13632^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2410 + ... + 22070.

Almost surely, 2^240650640 is an apocalyptic number.

240650640 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 240650640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (427884444).

240650640 is an abundant number, since it is smaller than the sum of its proper divisors (615118248).

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

240650640 is a wasteful number, since it uses less digits than its factorization.

240650640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19697 (or 19688 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 240650640 is about 15512.9184875058. The cubic root of 240650640 is about 622.0075749604.

The spelling of 240650640 in words is "two hundred forty million, six hundred fifty thousand, six hundred forty".