140308906 has 8 divisors (see below), whose sum is σ = 213913764. Its totient is φ = 69004320.

The previous prime is 140308867. The next prime is 140308919. The reversal of 140308906 is 609803041.

140308906 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 132135025 + 8173881 = 11495^2 + 2859^2 .

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, 574915 + ... + 575158.

Almost surely, 2^140308906 is an apocalyptic number.

140308906 is a deficient number, since it is larger than the sum of its proper divisors (73604858).

140308906 is a wasteful number, since it uses less digits than its factorization.

140308906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1150136.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 140308906 is about 11845.2060345103. The cubic root of 140308906 is about 519.6310326389.

The spelling of 140308906 in words is "one hundred forty million, three hundred eight thousand, nine hundred six".