140209686 has 24 divisors (see below), whose sum is σ = 304073640. Its totient is φ = 46692576.

The previous prime is 140209673. The next prime is 140209723. The reversal of 140209686 is 686902041.

140209686 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 140209686.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20181 + ... + 26223.

It is an arithmetic number, because the mean of its divisors is an integer number (12669735).

Almost surely, 2^140209686 is an apocalyptic number.

140209686 is an abundant number, since it is smaller than the sum of its proper divisors (163863954).

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

140209686 is a wasteful number, since it uses less digits than its factorization.

140209686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7340 (or 7337 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 140209686 is about 11841.0171015838. The cubic root of 140209686 is about 519.5085173726.

The spelling of 140209686 in words is "one hundred forty million, two hundred nine thousand, six hundred eighty-six".