140640446 has 16 divisors (see below), whose sum is σ = 220384800. Its totient is φ = 67185888.

The previous prime is 140640407. The next prime is 140640491. The reversal of 140640446 is 644046041.

140640446 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77720 + ... + 79508.

It is an arithmetic number, because the mean of its divisors is an integer number (13774050).

Almost surely, 2^140640446 is an apocalyptic number.

140640446 is a deficient number, since it is larger than the sum of its proper divisors (79744354).

140640446 is a wasteful number, since it uses less digits than its factorization.

140640446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3523.

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 140640446 is about 11859.1924682923. The cubic root of 140640446 is about 520.0399944584.

Adding to 140640446 its reverse (644046041), we get a palindrome (784686487).

The spelling of 140640446 in words is "one hundred forty million, six hundred forty thousand, four hundred forty-six".