140069978 has 8 divisors (see below), whose sum is σ = 210790272. Its totient is φ = 69806556.

The previous prime is 140069947. The next prime is 140070017. The reversal of 140069978 is 879960041.

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

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, 113450 + ... + 114677.

It is an arithmetic number, because the mean of its divisors is an integer number (26348784).

Almost surely, 2^140069978 is an apocalyptic number.

140069978 is a deficient number, since it is larger than the sum of its proper divisors (70720294).

140069978 is a wasteful number, since it uses less digits than its factorization.

140069978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228436.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 140069978 is about 11835.1163069908. The cubic root of 140069978 is about 519.3359101442.

The spelling of 140069978 in words is "one hundred forty million, sixty-nine thousand, nine hundred seventy-eight".