140409836 has 24 divisors (see below), whose sum is σ = 281087520. Its totient is φ = 60118272.

The previous prime is 140409811. The next prime is 140409839. The reversal of 140409836 is 638904041.

It is a junction number, because it is equal to n+sod(n) for n = 140409796 and 140409805.

It is not an unprimeable number, because it can be changed into a prime (140409839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41870 + ... + 45098.

It is an arithmetic number, because the mean of its divisors is an integer number (11711980).

Almost surely, 2^140409836 is an apocalyptic number.

It is an amenable number.

140409836 is an abundant number, since it is smaller than the sum of its proper divisors (140677684).

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

140409836 is a wasteful number, since it uses less digits than its factorization.

140409836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4793 (or 4791 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 140409836 is about 11849.4656419604. The cubic root of 140409836 is about 519.7556001403.

The spelling of 140409836 in words is "one hundred forty million, four hundred nine thousand, eight hundred thirty-six".