681847480 has 32 divisors (see below), whose sum is σ = 1583648640. Its totient is φ = 263940480.

The previous prime is 681847477. The next prime is 681847487. The reversal of 681847480 is 84748186.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 681847480.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681847487) 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, 273699 + ... + 276178.

It is an arithmetic number, because the mean of its divisors is an integer number (49489020).

Almost surely, 2^681847480 is an apocalyptic number.

It is an amenable number.

681847480 is an abundant number, since it is smaller than the sum of its proper divisors (901801160).

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

681847480 is a wasteful number, since it uses less digits than its factorization.

681847480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549919 (or 549915 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 46.

The square root of 681847480 is about 26112.2094047976. The cubic root of 681847480 is about 880.1615922262.

The spelling of 681847480 in words is "six hundred eighty-one million, eight hundred forty-seven thousand, four hundred eighty".