681202908 has 72 divisors (see below), whose sum is σ = 1764650160. Its totient is φ = 221495040.

The previous prime is 681202901. The next prime is 681202909. The reversal of 681202908 is 809202186.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681202901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 289818 + ... + 292158.

It is an arithmetic number, because the mean of its divisors is an integer number (24509030).

Almost surely, 2^681202908 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 681202908, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (882325080).

681202908 is an abundant number, since it is smaller than the sum of its proper divisors (1083447252).

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

681202908 is a wasteful number, since it uses less digits than its factorization.

681202908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2547 (or 2542 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 681202908 is about 26099.8641375774. The cubic root of 681202908 is about 879.8841565830.

The spelling of 681202908 in words is "six hundred eighty-one million, two hundred two thousand, nine hundred eight".