140440 has 16 divisors (see below), whose sum is σ = 316080. Its totient is φ = 56160.

The previous prime is 140423. The next prime is 140443. The reversal of 140440 is 44041.

140440 = T₆₃ + T₆₄ + ... + T₁₀₂.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 140440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140443) 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, 1716 + ... + 1795.

It is an arithmetic number, because the mean of its divisors is an integer number (19755).

2¹⁴⁰⁴⁴⁰ is an apocalyptic number.

140440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140440 is an abundant number, since it is smaller than the sum of its proper divisors (175640).

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

140440 is a wasteful number, since it uses less digits than its factorization.

140440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3522 (or 3518 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 140440 is about 374.7532521540. The cubic root of 140440 is about 51.9792816871.

Adding to 140440 its reverse (44041), we get a palindrome (184481).

It can be divided in two parts, 1404 and 40, that added together give a square (1444 = 38²).

The spelling of 140440 in words is "one hundred forty thousand, four hundred forty", and thus it is an iban number.