240640064 has 28 divisors (see below), whose sum is σ = 545738304. Its totient is φ = 103131264.

The previous prime is 240640061. The next prime is 240640067. The reversal of 240640064 is 460046042.

It is an interprime number because it is at equal distance from previous prime (240640061) and next prime (240640067).

It is a tau number, because it is divible by the number of its divisors (28).

It is not an unprimeable number, because it can be changed into a prime (240640061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268124 + ... + 269019.

Almost surely, 2^240640064 is an apocalyptic number.

It is an amenable number.

240640064 is an abundant number, since it is smaller than the sum of its proper divisors (305098240).

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

240640064 is an equidigital number, since it uses as much as digits as its factorization.

240640064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537162 (or 537152 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 240640064 is about 15512.5776065746. The cubic root of 240640064 is about 621.9984629291.

The spelling of 240640064 in words is "two hundred forty million, six hundred forty thousand, sixty-four".