681902286 has 96 divisors (see below), whose sum is σ = 1579461408. Its totient is φ = 195022080.

The previous prime is 681902281. The next prime is 681902297. The reversal of 681902286 is 682209186.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681902281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1717440 + ... + 1717836.

It is an arithmetic number, because the mean of its divisors is an integer number (16452723).

Almost surely, 2^681902286 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 681902286, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (789730704).

681902286 is an abundant number, since it is smaller than the sum of its proper divisors (897559122).

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

681902286 is a wasteful number, since it uses less digits than its factorization.

681902286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514 (or 495 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 681902286 is about 26113.2588161646. The cubic root of 681902286 is about 880.1851736699.

The spelling of 681902286 in words is "six hundred eighty-one million, nine hundred two thousand, two hundred eighty-six".