140809444 has 6 divisors (see below), whose sum is σ = 246416534. Its totient is φ = 70404720.

The previous prime is 140809441. The next prime is 140809447. The reversal of 140809444 is 444908041.

It is an interprime number because it is at equal distance from previous prime (140809441) and next prime (140809447).

It can be written as a sum of positive squares in only one way, i.e., 140707044 + 102400 = 11862^2 + 320^2 .

It is not an unprimeable number, because it can be changed into a prime (140809441) by changing a digit.

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 as a sum of consecutive naturals, namely, 17601177 + ... + 17601184.

Almost surely, 2^140809444 is an apocalyptic number.

It is an amenable number.

140809444 is a deficient number, since it is larger than the sum of its proper divisors (105607090).

140809444 is a wasteful number, since it uses less digits than its factorization.

140809444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35202365 (or 35202363 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 140809444 is about 11866.3155191492. The cubic root of 140809444 is about 520.2482099063.

The spelling of 140809444 in words is "one hundred forty million, eight hundred nine thousand, four hundred forty-four".