140139878 has 8 divisors (see below), whose sum is σ = 210285768. Its totient is φ = 70044624.

The previous prime is 140139863. The next prime is 140139899. The reversal of 140139878 is 878931041.

140139878 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4751 + ... + 17402.

It is an arithmetic number, because the mean of its divisors is an integer number (26285721).

Almost surely, 2^140139878 is an apocalyptic number.

140139878 is a deficient number, since it is larger than the sum of its proper divisors (70145890).

140139878 is a wasteful number, since it uses less digits than its factorization.

140139878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25318.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 140139878 is about 11838.0690148351. The cubic root of 140139878 is about 519.4222849303.

The spelling of 140139878 in words is "one hundred forty million, one hundred thirty-nine thousand, eight hundred seventy-eight".