140821686 has 32 divisors (see below), whose sum is σ = 326545920. Its totient is φ = 44899272.

The previous prime is 140821679. The next prime is 140821691. The reversal of 140821686 is 686128041.

It is a self number, because there is not a number n which added to its sum of digits gives 140821686.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55450 + ... + 57933.

It is an arithmetic number, because the mean of its divisors is an integer number (10204560).

Almost surely, 2^140821686 is an apocalyptic number.

140821686 is an abundant number, since it is smaller than the sum of its proper divisors (185724234).

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

140821686 is a wasteful number, since it uses less digits than its factorization.

140821686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113417 (or 113411 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 140821686 is about 11866.8313378088. The cubic root of 140821686 is about 520.2632862957.

The spelling of 140821686 in words is "one hundred forty million, eight hundred twenty-one thousand, six hundred eighty-six".