240640880 has 20 divisors (see below), whose sum is σ = 559490232. Its totient is φ = 96256320.

The previous prime is 240640867. The next prime is 240640903. The reversal of 240640880 is 88046042.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1503926 + ... + 1504085.

Almost surely, 2^240640880 is an apocalyptic number.

240640880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

240640880 is an abundant number, since it is smaller than the sum of its proper divisors (318849352).

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

240640880 is a wasteful number, since it uses less digits than its factorization.

240640880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3008024 (or 3008018 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 32.

The square root of 240640880 is about 15512.6039077906. The cubic root of 240640880 is about 621.9991659849. Note that the first 3 decimals are identical.

The spelling of 240640880 in words is "two hundred forty million, six hundred forty thousand, eight hundred eighty".