140185668 has 72 divisors (see below), whose sum is σ = 382082400. Its totient is φ = 39887232.

The previous prime is 140185651. The next prime is 140185673. The reversal of 140185668 is 866581041.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 246088 + ... + 246656.

It is an arithmetic number, because the mean of its divisors is an integer number (5306700).

Almost surely, 2^140185668 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 140185668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191041200).

140185668 is an abundant number, since it is smaller than the sum of its proper divisors (241896732).

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

140185668 is a wasteful number, since it uses less digits than its factorization.

140185668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009 (or 1000 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 140185668 is about 11840.0028716213. The cubic root of 140185668 is about 519.4788516425.

The spelling of 140185668 in words is "one hundred forty million, one hundred eighty-five thousand, six hundred sixty-eight".