140440643 has 8 divisors (see below), whose sum is σ = 162899712. Its totient is φ = 118580616.

The previous prime is 140440639. The next prime is 140440669. The reversal of 140440643 is 346044041.

140440643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 140440643 - 2² = 140440639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140440613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149255 + ... + 150192.

It is an arithmetic number, because the mean of its divisors is an integer number (20362464).

Almost surely, 2^140440643 is an apocalyptic number.

140440643 is a deficient number, since it is larger than the sum of its proper divisors (22459069).

140440643 is an equidigital number, since it uses as much as digits as its factorization.

140440643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299521.

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 140440643 is about 11850.7655027007. The cubic root of 140440643 is about 519.7936101551.

Adding to 140440643 its reverse (346044041), we get a palindrome (486484684).

The spelling of 140440643 in words is "one hundred forty million, four hundred forty thousand, six hundred forty-three".