140023865 has 16 divisors (see below), whose sum is σ = 171470208. Its totient is φ = 109748736.

The previous prime is 140023859. The next prime is 140023889. The reversal of 140023865 is 568320041.

It is a cyclic number.

It is not a de Polignac number, because 140023865 - 2⁶ = 140023801 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48554 + ... + 51356.

It is an arithmetic number, because the mean of its divisors is an integer number (10716888).

Almost surely, 2^140023865 is an apocalyptic number.

It is an amenable number.

140023865 is a deficient number, since it is larger than the sum of its proper divisors (31446343).

140023865 is a wasteful number, since it uses less digits than its factorization.

140023865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3008.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 140023865 is about 11833.1680035399. The cubic root of 140023865 is about 519.2789130021.

The spelling of 140023865 in words is "one hundred forty million, twenty-three thousand, eight hundred sixty-five".