140135440 has 20 divisors (see below), whose sum is σ = 325815084. Its totient is φ = 56054144.

The previous prime is 140135423. The next prime is 140135447. The reversal of 140135440 is 44531041.

It can be written as a sum of positive squares in 2 ways, for example, as 34621456 + 105513984 = 5884^2 + 10272^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (140135447) 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, 875767 + ... + 875926.

Almost surely, 2^140135440 is an apocalyptic number.

140135440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140135440 is an abundant number, since it is smaller than the sum of its proper divisors (185679644).

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

140135440 is a wasteful number, since it uses less digits than its factorization.

140135440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1751706 (or 1751700 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 140135440 is about 11837.8815672400. The cubic root of 140135440 is about 519.4168017886.

Adding to 140135440 its reverse (44531041), we get a palindrome (184666481).

The spelling of 140135440 in words is "one hundred forty million, one hundred thirty-five thousand, four hundred forty".