240778660 has 12 divisors (see below), whose sum is σ = 505635228. Its totient is φ = 96311456.

The previous prime is 240778639. The next prime is 240778661. The reversal of 240778660 is 66877042.

It can be written as a sum of positive squares in 2 ways, for example, as 139051264 + 101727396 = 11792^2 + 10086^2 .

It is a super-2 number, since 2×240778660² = 115948726222791200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (240778661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6019447 + ... + 6019486.

It is an arithmetic number, because the mean of its divisors is an integer number (42136269).

Almost surely, 2^240778660 is an apocalyptic number.

240778660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

240778660 is an abundant number, since it is smaller than the sum of its proper divisors (264856568).

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

240778660 is a wasteful number, since it uses less digits than its factorization.

240778660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12038942 (or 12038940 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 40.

The square root of 240778660 is about 15517.0441772910. The cubic root of 240778660 is about 622.1178527939.

The spelling of 240778660 in words is "two hundred forty million, seven hundred seventy-eight thousand, six hundred sixty".