140806656 has 60 divisors (see below), whose sum is σ = 406390842. Its totient is φ = 46934016.

The previous prime is 140806651. The next prime is 140806657. The reversal of 140806656 is 656608041.

It can be written as a sum of positive squares in only one way, i.e., 138297600 + 2509056 = 11760^2 + 1584^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 140806656.

It is not an unprimeable number, because it can be changed into a prime (140806651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10671 + ... + 19886.

Almost surely, 2^140806656 is an apocalyptic number.

140806656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

140806656 is an abundant number, since it is smaller than the sum of its proper divisors (265584186).

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

140806656 is an equidigital number, since it uses as much as digits as its factorization.

140806656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30581 (or 30562 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 140806656 is about 11866.1980431813. The cubic root of 140806656 is about 520.2447762787.

It can be divided in two parts, 14080 and 6656, that added together give a 4-th power (20736 = 12⁴).

The spelling of 140806656 in words is "one hundred forty million, eight hundred six thousand, six hundred fifty-six".