140243040 has 144 divisors (see below), whose sum is σ = 546987168. Its totient is φ = 32053248.

The previous prime is 140243023. The next prime is 140243053. The reversal of 140243040 is 40342041.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×140243040² = 39336220536883200, 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 an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3124 + ... + 17036.

It is an arithmetic number, because the mean of its divisors is an integer number (3798522).

Almost surely, 2^140243040 is an apocalyptic number.

140243040 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 140243040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (273493584).

140243040 is an abundant number, since it is smaller than the sum of its proper divisors (406744128).

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

140243040 is a wasteful number, since it uses less digits than its factorization.

140243040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13941 (or 13930 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 140243040 is about 11842.4254272510. The cubic root of 140243040 is about 519.5497088046.

Adding to 140243040 its reverse (40342041), we get a palindrome (180585081).

Subtracting from 140243040 its reverse (40342041), we obtain a palindrome (99900999).

The spelling of 140243040 in words is "one hundred forty million, two hundred forty-three thousand, forty".