240078640 has 20 divisors (see below), whose sum is σ = 558183024. Its totient is φ = 96031424.

The previous prime is 240078593. The next prime is 240078647. The reversal of 240078640 is 46870042.

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

It is not an unprimeable number, because it can be changed into a prime (240078647) 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, 1500412 + ... + 1500571.

Almost surely, 2^240078640 is an apocalyptic number.

240078640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

240078640 is an abundant number, since it is smaller than the sum of its proper divisors (318104384).

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

240078640 is a wasteful number, since it uses less digits than its factorization.

240078640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3000996 (or 3000990 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 240078640 is about 15494.4712720376. The cubic root of 240078640 is about 621.5143695464.

The spelling of 240078640 in words is "two hundred forty million, seventy-eight thousand, six hundred forty".