140281636 has 24 divisors (see below), whose sum is σ = 281907360. Its totient is φ = 60408000.

The previous prime is 140281633. The next prime is 140281649. The reversal of 140281636 is 636182041.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 140281598 and 140281607.

It is not an unprimeable number, because it can be changed into a prime (140281633) by changing a digit.

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, 83065 + ... + 84736.

It is an arithmetic number, because the mean of its divisors is an integer number (11746140).

Almost surely, 2^140281636 is an apocalyptic number.

It is an amenable number.

140281636 is an abundant number, since it is smaller than the sum of its proper divisors (141625724).

140281636 is a wasteful number, since it uses less digits than its factorization.

140281636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167835 (or 167833 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 140281636 is about 11844.0548799809. The cubic root of 140281636 is about 519.5973658370.

It can be divided in two parts, 1402 and 81636, that added together give a palindrome (83038).

The spelling of 140281636 in words is "one hundred forty million, two hundred eighty-one thousand, six hundred thirty-six".