140391306 has 48 divisors (see below), whose sum is σ = 344137248. Its totient is φ = 42541200.

The previous prime is 140391289. The next prime is 140391319. The reversal of 140391306 is 603193041.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 140391306.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7785 + ... + 18476.

It is an arithmetic number, because the mean of its divisors is an integer number (7169526).

Almost surely, 2^140391306 is an apocalyptic number.

140391306 is an abundant number, since it is smaller than the sum of its proper divisors (203745942).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

140391306 is a wasteful number, since it uses less digits than its factorization.

140391306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26289 (or 26277 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 140391306 is about 11848.6837243636. The cubic root of 140391306 is about 519.7327349449.

The spelling of 140391306 in words is "one hundred forty million, three hundred ninety-one thousand, three hundred six".