140809856 has 64 divisors (see below), whose sum is σ = 309476160. Its totient is φ = 63283200.

The previous prime is 140809849. The next prime is 140809871. The reversal of 140809856 is 658908041.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136061 + ... + 137091.

It is an arithmetic number, because the mean of its divisors is an integer number (4835565).

Almost surely, 2^140809856 is an apocalyptic number.

140809856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 140809856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154738080).

140809856 is an abundant number, since it is smaller than the sum of its proper divisors (168666304).

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

140809856 is a wasteful number, since it uses less digits than its factorization.

140809856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1153 (or 1141 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 140809856 is about 11866.3328792007. The cubic root of 140809856 is about 520.2487173108.

The spelling of 140809856 in words is "one hundred forty million, eight hundred nine thousand, eight hundred fifty-six".