140043440 has 40 divisors (see below), whose sum is σ = 327785568. Its totient is φ = 55641600.

The previous prime is 140043439. The next prime is 140043451. The reversal of 140043440 is 44340041.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×140043440² = 39224330174067200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 6284 + ... + 17876.

Almost surely, 2^140043440 is an apocalyptic number.

140043440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 140043440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163892784).

140043440 is an abundant number, since it is smaller than the sum of its proper divisors (187742128).

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

140043440 is a wasteful number, since it uses less digits than its factorization.

140043440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11757 (or 11751 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 140043440 is about 11833.9950988667. The cubic root of 140043440 is about 519.3031098561.

Adding to 140043440 its reverse (44340041), we get a palindrome (184383481).

The spelling of 140043440 in words is "one hundred forty million, forty-three thousand, four hundred forty".