140244040 has 16 divisors (see below), whose sum is σ = 315549180. Its totient is φ = 56097600.

The previous prime is 140244011. The next prime is 140244043. The reversal of 140244040 is 40442041.

It can be written as a sum of positive squares in 2 ways, for example, as 138721284 + 1522756 = 11778^2 + 1234^2 .

It is a junction number, because it is equal to n+sod(n) for n = 140243999 and 140244017.

It is not an unprimeable number, because it can be changed into a prime (140244043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1753011 + ... + 1753090.

Almost surely, 2^140244040 is an apocalyptic number.

140244040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140244040 is an abundant number, since it is smaller than the sum of its proper divisors (175305140).

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

140244040 is a wasteful number, since it uses less digits than its factorization.

140244040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3506112 (or 3506108 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 140244040 is about 11842.4676482564. The cubic root of 140244040 is about 519.5509436811.

Adding to 140244040 its reverse (40442041), we get a palindrome (180686081).

The spelling of 140244040 in words is "one hundred forty million, two hundred forty-four thousand, forty".