240138678 has 32 divisors (see below), whose sum is σ = 519708672. Its totient is φ = 73533600.

The previous prime is 240138677. The next prime is 240138751. The reversal of 240138678 is 876831042.

240138678 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240138677) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9163 + ... + 23753.

It is an arithmetic number, because the mean of its divisors is an integer number (16240896).

Almost surely, 2^240138678 is an apocalyptic number.

240138678 is an abundant number, since it is smaller than the sum of its proper divisors (279569994).

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

240138678 is a wasteful number, since it uses less digits than its factorization.

240138678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14820.

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 240138678 is about 15496.4085516613. The cubic root of 240138678 is about 621.5661739186.

The spelling of 240138678 in words is "two hundred forty million, one hundred thirty-eight thousand, six hundred seventy-eight".