240246640 has 80 divisors (see below), whose sum is σ = 591926400. Its totient is φ = 90429696.

The previous prime is 240246637. The next prime is 240246647. The reversal of 240246640 is 46642042.

240246640 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 240246599 and 240246608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240246647) 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, 271639 + ... + 272521.

It is an arithmetic number, because the mean of its divisors is an integer number (7399080).

Almost surely, 2^240246640 is an apocalyptic number.

240246640 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 240246640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (295963200).

240246640 is an abundant number, since it is smaller than the sum of its proper divisors (351679760).

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

240246640 is a wasteful number, since it uses less digits than its factorization.

240246640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1094 (or 1088 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 240246640 is about 15499.8916125243. The cubic root of 240246640 is about 621.6593082606.

Adding to 240246640 its reverse (46642042), we get a palindrome (286888682).

The spelling of 240246640 in words is "two hundred forty million, two hundred forty-six thousand, six hundred forty".