140040144 has 80 divisors (see below), whose sum is σ = 414973440. Its totient is φ = 45169920.

The previous prime is 140040143. The next prime is 140040149. The reversal of 140040144 is 441040041.

It is a super-2 number, since 2×140040144² = 39222483863081472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140040143) 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 15 ways as a sum of consecutive naturals, for example, 8164 + ... + 18620.

It is an arithmetic number, because the mean of its divisors is an integer number (5187168).

Almost surely, 2^140040144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 140040144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (207486720).

140040144 is an abundant number, since it is smaller than the sum of its proper divisors (274933296).

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

140040144 is a wasteful number, since it uses less digits than its factorization.

140040144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10505 (or 10493 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 140040144 is about 11833.8558382296. The cubic root of 140040144 is about 519.2990357953.

Adding to 140040144 its reverse (441040041), we get a palindrome (581080185).

The spelling of 140040144 in words is "one hundred forty million, forty thousand, one hundred forty-four".