140013440 has 64 divisors (see below), whose sum is σ = 382548960. Its totient is φ = 48003072.

The previous prime is 140013437. The next prime is 140013463. The reversal of 140013440 is 44310041.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 11147 + ... + 20106.

Almost surely, 2^140013440 is an apocalyptic number.

140013440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140013440 is an abundant number, since it is smaller than the sum of its proper divisors (242535520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

140013440 is an equidigital number, since it uses as much as digits as its factorization.

140013440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31279 (or 31267 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 140013440 is about 11832.7274962284. The cubic root of 140013440 is about 519.2660256346.

Adding to 140013440 its reverse (44310041), we get a palindrome (184323481).

The spelling of 140013440 in words is "one hundred forty million, thirteen thousand, four hundred forty".