140644006 has 4 divisors (see below), whose sum is σ = 210966012. Its totient is φ = 70322002.

The previous prime is 140644003. The next prime is 140644037. The reversal of 140644006 is 600446041.

140644006 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 600446041 = 13 ⋅46188157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140644001) 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, 35161000 + ... + 35161003.

It is an arithmetic number, because the mean of its divisors is an integer number (52741503).

Almost surely, 2^140644006 is an apocalyptic number.

140644006 is a deficient number, since it is larger than the sum of its proper divisors (70322006).

140644006 is an equidigital number, since it uses as much as digits as its factorization.

140644006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70322005.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 140644006 is about 11859.3425618792. The cubic root of 140644006 is about 520.0443823065.

The spelling of 140644006 in words is "one hundred forty million, six hundred forty-four thousand, six".