140243236 has 48 divisors (see below), whose sum is σ = 297722880. Its totient is φ = 56501280.

The previous prime is 140243227. The next prime is 140243239. The reversal of 140243236 is 632342041.

It is a self number, because there is not a number n which added to its sum of digits gives 140243236.

It is not an unprimeable number, because it can be changed into a prime (140243239) 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, 36151 + ... + 39841.

It is an arithmetic number, because the mean of its divisors is an integer number (6202560).

Almost surely, 2^140243236 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 140243236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148861440).

140243236 is an abundant number, since it is smaller than the sum of its proper divisors (157479644).

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

140243236 is a wasteful number, since it uses less digits than its factorization.

140243236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3784 (or 3782 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 140243236 is about 11842.4337025799. The cubic root of 140243236 is about 519.5499508409.

Adding to 140243236 its reverse (632342041), we get a palindrome (772585277).

The spelling of 140243236 in words is "one hundred forty million, two hundred forty-three thousand, two hundred thirty-six".