140543644 has 12 divisors (see below), whose sum is σ = 248250744. Its totient is φ = 69614864.

The previous prime is 140543633. The next prime is 140543647. The reversal of 140543644 is 446345041.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140543647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163759 + ... + 164614.

It is an arithmetic number, because the mean of its divisors is an integer number (20687562).

Almost surely, 2^140543644 is an apocalyptic number.

It is an amenable number.

140543644 is a deficient number, since it is larger than the sum of its proper divisors (107707100).

140543644 is a wasteful number, since it uses less digits than its factorization.

140543644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328484 (or 328482 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 140543644 is about 11855.1104592070. The cubic root of 140543644 is about 519.9206535737.

Adding to 140543644 its reverse (446345041), we get a palindrome (586888685).

The spelling of 140543644 in words is "one hundred forty million, five hundred forty-three thousand, six hundred forty-four".