140305240 has 32 divisors (see below), whose sum is σ = 316910880. Its totient is φ = 55904512.

The previous prime is 140305237. The next prime is 140305247. The reversal of 140305240 is 42503041.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140305247) 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 7 ways as a sum of consecutive naturals, for example, 3852 + ... + 17188.

It is an arithmetic number, because the mean of its divisors is an integer number (9903465).

Almost surely, 2^140305240 is an apocalyptic number.

140305240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140305240 is an abundant number, since it is smaller than the sum of its proper divisors (176605640).

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

140305240 is a wasteful number, since it uses less digits than its factorization.

140305240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13611 (or 13607 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 140305240 is about 11845.0512873520. The cubic root of 140305240 is about 519.6265069486.

Adding to 140305240 its reverse (42503041), we get a palindrome (182808281).

The spelling of 140305240 in words is "one hundred forty million, three hundred five thousand, two hundred forty".