681072860 has 48 divisors (see below), whose sum is σ = 1621351200. Its totient is φ = 238235904.

The previous prime is 681072857. The next prime is 681072863. The reversal of 681072860 is 68270186.

It is an interprime number because it is at equal distance from previous prime (681072857) and next prime (681072863).

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681072863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63995 + ... + 73874.

It is an arithmetic number, because the mean of its divisors is an integer number (33778150).

Almost surely, 2^681072860 is an apocalyptic number.

It is an amenable number.

681072860 is an abundant number, since it is smaller than the sum of its proper divisors (940278340).

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

681072860 is a wasteful number, since it uses less digits than its factorization.

681072860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137910 (or 137908 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 681072860 is about 26097.3726646956. The cubic root of 681072860 is about 879.8281603172.

The spelling of 681072860 in words is "six hundred eighty-one million, seventy-two thousand, eight hundred sixty".