681500238 has 16 divisors (see below), whose sum is σ = 1363521360. Its totient is φ = 227079936.

The previous prime is 681500219. The next prime is 681500243. The reversal of 681500238 is 832005186.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 681500199 and 681500208.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3523 + ... + 37086.

It is an arithmetic number, because the mean of its divisors is an integer number (85220085).

Almost surely, 2^681500238 is an apocalyptic number.

681500238 is an abundant number, since it is smaller than the sum of its proper divisors (682021122).

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

681500238 is a wasteful number, since it uses less digits than its factorization.

681500238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43411.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 681500238 is about 26105.5595228296. The cubic root of 681500238 is about 880.0121546186.

The spelling of 681500238 in words is "six hundred eighty-one million, five hundred thousand, two hundred thirty-eight".