240138679 has 8 divisors (see below), whose sum is σ = 270420480. Its totient is φ = 211265400.

The previous prime is 240138677. The next prime is 240138751. The reversal of 240138679 is 976831042.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 240138679 - 2¹ = 240138677 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 351769 + ... + 352450.

It is an arithmetic number, because the mean of its divisors is an integer number (33802560).

Almost surely, 2^240138679 is an apocalyptic number.

240138679 is a deficient number, since it is larger than the sum of its proper divisors (30281801).

240138679 is a wasteful number, since it uses less digits than its factorization.

240138679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704261.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 240138679 is about 15496.4085839268. The cubic root of 240138679 is about 621.5661747814.

The spelling of 240138679 in words is "two hundred forty million, one hundred thirty-eight thousand, six hundred seventy-nine".