681774380 has 24 divisors (see below), whose sum is σ = 1636258848. Its totient is φ = 233751168.

The previous prime is 681774377. The next prime is 681774389. The reversal of 681774380 is 83477186.

It is not an unprimeable number, because it can be changed into a prime (681774389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2434769 + ... + 2435048.

It is an arithmetic number, because the mean of its divisors is an integer number (68177452).

Almost surely, 2^681774380 is an apocalyptic number.

It is an amenable number.

681774380 is an abundant number, since it is smaller than the sum of its proper divisors (954484468).

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

681774380 is a wasteful number, since it uses less digits than its factorization.

681774380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4869833 (or 4869831 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 44.

The square root of 681774380 is about 26110.8096389216. The cubic root of 681774380 is about 880.1301374343.

The spelling of 681774380 in words is "six hundred eighty-one million, seven hundred seventy-four thousand, three hundred eighty".