240449640 has 128 divisors (see below), whose sum is σ = 752716800. Its totient is φ = 61378560.

The previous prime is 240449639. The next prime is 240449641. The reversal of 240449640 is 46944042.

240449640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (240449639) and next prime (240449641).

It is a super-2 number, since 2×240449640² = 115632058752259200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (240449641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 405184 + ... + 405776.

It is an arithmetic number, because the mean of its divisors is an integer number (5880600).

Almost surely, 2^240449640 is an apocalyptic number.

240449640 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 240449640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (376358400).

240449640 is an abundant number, since it is smaller than the sum of its proper divisors (512267160).

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

240449640 is a wasteful number, since it uses less digits than its factorization.

240449640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747 (or 743 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 33.

The square root of 240449640 is about 15506.4386626975. The cubic root of 240449640 is about 621.8343524184.

The spelling of 240449640 in words is "two hundred forty million, four hundred forty-nine thousand, six hundred forty".