140631436 has 12 divisors (see below), whose sum is σ = 268478280. Its totient is φ = 63923360.

The previous prime is 140631433. The next prime is 140631437. The reversal of 140631436 is 634136041.

It is not an unprimeable number, because it can be changed into a prime (140631431) 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 3 ways as a sum of consecutive naturals, for example, 1598041 + ... + 1598128.

It is an arithmetic number, because the mean of its divisors is an integer number (22373190).

Almost surely, 2^140631436 is an apocalyptic number.

It is an amenable number.

140631436 is a deficient number, since it is larger than the sum of its proper divisors (127846844).

140631436 is a wasteful number, since it uses less digits than its factorization.

140631436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3196184 (or 3196182 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 140631436 is about 11858.8125881135. The cubic root of 140631436 is about 520.0288889276.

Adding to 140631436 its reverse (634136041), we get a palindrome (774767477).

The spelling of 140631436 in words is "one hundred forty million, six hundred thirty-one thousand, four hundred thirty-six".